Issued by the
Canadian Commission on Building and Fire Codes
National Research Council of Canada
First Edition 2006 ISBN 0-660-19633-6 NR24-7/2005-1E-MRC
NRCC 48672
© National Research Council of Canada 2006 Ottawa
World Rights Reserved Published in Canada
Second Release
Includes Revisions and Errata released on December 1, 2007 and June 20, 2008
Aussi disponible en français : Guide de l'utilisateur – CNP 2005 Énoncés d'application et énoncés d'intention
CNRC 48672F ISBN 0-660-97192-5
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The 2005 edition of the National Model Construction Codes is presented in a new format called “objective-based codes” that is structured in three Divisions (A, B and C). For the first time, the Codes contain explicitly defined objectives and functional statements (see Division A), which are statements on the functions that the components of a building or facility must perform and the objectives that these functions must satisfy. Most of the Code provisions in Division B-now called acceptable solutions-are linked to at least one of those objectives and functional statements. These new elements were developed through a process called “bottom-up analysis,” which involved the analysis of each provision in the 1995 Codes to determine its intent and application and derive applicable objectives and functional statements. The Canadian Commission on Building and Fire Codes (CCBFC) wanted the scope of each Code to remain unchanged through its conversion to an objective-based format.
The bottom-up analysis of the acceptable solutions was carried out by the standing committees of the CCBFC with extensive support from the staff of the Canadian Codes Centre (CCC) together with groups of subject matter experts and external consultants. The technical changes that have been incorporated into Division B of the 2005 Codes also underwent the same bottom-up analysis. The results were reviewed, revised and approved by the appropriate standing committee.
Although the intent and application statements are included in the integral CD-ROM version of the 2005 Codes, it soon became apparent that this information would also be a valuable resource for users of the printed versions of the Codes. And so it was decided to publish the intent and application statements on CD-ROM as userʹs guides to each Code.
Understanding the Content of the User's Guide - NPC 2005, Intent and
Application Statements
Only the provisions in Part 2 of Division B (i.e. the acceptable solutions not including their Appendix Notes) have intent and application statements and, if applicable, objectives and functional statements.
Clicking on a Sentence reference in the left-hand portion of the screen brings up an analysis window on the right-hand side, which contains that Sentenceʹs applicable objectives, attributions and intent and application statements.
Code Reference
For the most part, entire Sentences are analyzed as units of text. In such cases, only the Sentence number is identified in the analysis window and the actual text of the Sentence can be found in the printed Code. In some instances, however, the analysis applies to only a portion of a Sentence; in such cases, the Clause or Subclause being analyzed is identified in the field entitled “Attribution” or the portion of text being analyzed is quoted or summarized in that field and introduced by the phrase “Applies to.”
Objective
The objectives attributed to the provisions or portions of provisions in Division B are derived from the bottom-up analysis. Each analysis window contains tabs displaying the acronyms for each objective attributed to the text being analyzed. Clicking on a tab reveals a panel containing the information related to that objective attribution, e.g. OH1 Indoor Conditions.
Some provisions or portions of provisions in Division B have no objectives attributed to them. In such instances, the tab will display the symbol “+” rather than an objective such as OH1, OS3, etc. See a related discussion below under “Intent.”
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Attribution
The specific functional statements and sub-objectives attributed to the text being analyzed are presented in square brackets in the Attribution field. If the attributions and analysis (i.e. intent and application statements) apply to the entire Sentence, no explanatory text will appear before or after the square brackets; if they apply to only a portion of a Sentence, the square brackets will either be preceded by the Clause or Subclause identifier, or followed by a phrase beginning with “Applies to,” which specifies which portion of the Sentence the attributions and analysis apply to.
Application
An application statement for a provision or portion of provision contained in Division B specifies the component(s) of a building or facility to which the text being analyzed applies or in which circumstances the text applies.
Application statements generally identify which entity-i.e. occupancy, building element, material, activity, etc.-the Code provision applies to. The Code already contains provisions that state the application of most of the technical provisions but the application may be broadened or narrowed by cross-references or exceptions elsewhere in the Code. Sentence-, Clause- or Subclause-specific application statements combine all this information in one place.
Intent
An intent statement explains the purpose of a provision or portion of provision found in Division B. It reveals what the standing committee was trying to achieve by introducing the Code provision in the first place or what the Code-user community has come to understand as the reason for the provisionʹs existence.
Generally speaking, intent statements present the consequences of non-compliance with a requirement. They try to answer the question “What are the undesirable thing(s) that might happen if this provision is not complied with?” In many cases, the initial consequences of non-compliance may lead to a chain of consequences; the link between those consequences and the overall objective of the provision may only become apparent in the description of the latter consequences in the chain. All functional statements and objectives identified in Division A and attributed to the provisions in Division B of the 2005 Codes are derived from the intent statements.
Not all Code provisions are technical requirements; some act as definitions, clarifications, application modifiers or pointers to another provision. In such cases, the intent statement explains the role the provision plays in the Code and there is no chain of consquences. These types of provisions have no objectives or functional statements attributed to them. Appendix Note A-1.1.2.1.(1) in Division B of the Code provides information on how these types of provisions shall be interpreted in regards to their relation to objectives and functional statements.
Serious effort was put into using a consistent, logical approach and standardized set of phrases and terms in the development of the intent statements. It is the ongoing responsibility of the standing committees to maintain, update and improve the intent and application statements over time. Any suggestions towards these endeavours are welcome.
“To Limit the Probability”
Many of the hazards and undesirable events the Codes address, such as deterioration, spread of fire and heat loss, can only be minimized, retarded or controlled through compliance; other undesirable events such as the ignition of fire or structural collapse can never be prevented with absolute assurance. This is why the phrase “to limit the probability” is used in the intent statements rather than “to prevent.”
Using the phrase “to prevent” would mean that it is possible to comply fully with a requirement but still not meet its intent. The phrase “to limit the probability” was therefore adopted to clearly convey the notion that the Codes do not and cannot provide absolute protection.
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Additional circuit vent means a vent pipe that is installed between a circuit vent and a relief vent to
provide additional air circulation.
Air admittance valve means a one-way valve designed to allow air to enter the drainage system when
the pressure in the plumbing system is less than the atmospheric pressure. (See Appendix Note A-2.2.10.16.(1) of Division B.)
Air break means the unobstructed vertical distance between the lowest point of an indirectly connected
soil-or-waste pipe and the flood level rim of the fixture into which it discharges. (See Appendix Note A-2.3.3.11.(2) of Division B.)
Air gap means the unobstructed vertical distance through air between the lowest point of a water
supply outlet and the flood level rim of the fixture or device into which the outlet discharges. (See Appendix Note A-2.6.2.9.(2) of Division B.)
Alloyed zinc means an alloy of zinc having the corrosion resistance and physical properties of an alloy
containing 0.15% titanium, 0.74% copper and 99.11% zinc, and so tempered as to be capable of being formed into the shape required for a watertight joint.
Auxiliary water supply means any water supply on or available to the premises other than the primary
potable water supply. (See Appendix A.)
Backflow means a flowing back or reversal of the normal direction of the flow.
Backflow preventer means a device or a method that prevents backflow. (See Figure A-1.4.1.2.(1)-A in
Appendix A.)
Back pressure means pressure higher than the supply pressure.
Back-siphonage means backflow caused by a negative pressure in the supply system. (See
Figure A-1.4.1.2.(1)-B in Appendix A.)
Back-siphonage preventer (or vacuum breaker) means a device or a method that prevents
back-siphonage. (See Figure A-1.4.1.2.(1)-C in Appendix A.)
Backwater valve means a check valve designed for use in a gravity drainage system.
Bathroom group means a group of plumbing fixtures installed in the same room, consisting of one
domestic-type lavatory, one water closet and either one bathtub (with or without a shower) or one one-head shower.
Branch means a waste pipe connected at its upstream end to the junction of 2 or more
soil-or-waste pipes or to a soil-or-soil-or-waste stack, and connected at its downstream end to another branch, a sump, a soil-or-waste stack or a building drain. (See Figure A-1.4.1.2.(1)-F in Appendix A.)
Branch vent means a vent pipe that is connected at its lower end to the junction of 2 or more vent pipes,
and at its upper end, either to another branch vent or to a stack vent, vent stack or vent header, or terminates in open air. (See Figure A-1.4.1.2.(1)-D in Appendix A.)
Building* means any structure used or intended for supporting or sheltering any use or occupancy.
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Building sewer means a pipe that is connected to a building drain 1 m outside a wall of a building and
that leads to a public sewer or private sewage disposal system.
Building trap means a trap that is installed in a building drain or building sewer to prevent the
circulation of air between a drainage system and a public sewer. (See Appendix Note A-2.4.5.4.(1) of Division B.)
Care or detention occupancy* means the occupancy or use of a building or part thereof by persons who
require special care or treatment because of cognitive or physical limitations or by persons who are restrained from, or are incapable of, self-preservation because of security measures not under their control.
Check valve means a valve that permits flow in one direction but prevents a return flow.
Circuit vent means a vent pipe that serves a number of fixtures and connects to the fixture drain of the
most upstream fixture.
Class 1 fire sprinkler/standpipe system means an assembly of pipes and fittings that conveys water from
the water service pipe to the sprinkler/standpipe systemʹs outlets, is directly connected to the public water supply main only, has no pumps or reservoirs, and in which the sprinkler drains discharge to the atmosphere, to dry wells or to other safe outlets.
Class 2 fire sprinkler/standpipe system means a Class 1 fire sprinkler/standpipe system that includes a
booster pump in its connection to the public water supply main.
Class 3 fire sprinkler/standpipe system means an assembly of pipes and fittings that conveys water from
the water service pipe to the sprinkler/standpipe systemʹs outlets and is directly connected to the public water supply main as well as to one or more of the following storage facilities, which are filled from the public water supply main only: elevated water storage, fire pumps supplying water from aboveground covered reservoirs, or pressure tanks. The water in this sprinkler/standpipe system must be maintained in potable condition. (See Appendix A.)
Class 4 fire sprinkler/standpipe system means an assembly of pipes and fittings that conveys water from
the water service pipe to the sprinkler/standpipe systemʹs outlets and is directly connected to the public water supply main (similar to Class 1 and Class 2 fire sprinkler/standpipe systems) and to an auxiliary water supply dedicated to fire department use that is located within 520 m of a pumper connection.
Class 5 fire sprinkler/standpipe system means an assembly of pipes and fittings that conveys water from
the water service pipe to the sprinkler/standpipe systemʹs outlets and is directly connected to the public water supply main and also interconnected with an auxiliary water supply.
Class 6 fire sprinkler/standpipe system means an assembly of pipes and fittings that conveys water from
the water service pipe to the sprinkler/standpipe systemʹs outlets and acts as a combined industrial water supply and fire protection system supplied from the public water supply main only, with or without gravity storage or pump suction tanks.
Cleanout means an access provided in drainage and venting systems to provide for cleaning and
inspection services.
Clear-water waste means waste water with impurity levels that will not be harmful to health and may
include cooling water and condensate drainage from refrigeration and air-conditioning equipment and cooled condensate from steam heating systems, but does not include storm water. (See
Appendix A.)
Combined building drain means a building drain that is intended to conduct sewage and storm water. Combined building sewer means a building sewer that is intended to conduct sewage and storm water.
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(See Figure A-1.4.1.2.(1)-E in Appendix A.)
Critical level means the level of submergence at which the back-siphonage preventer ceases to prevent
back-siphonage.
Dead end means a pipe that terminates with a closed fitting.
Developed length means the length along the centre line of the pipe and fittings. (See Appendix
Note A-2.5.6.3.(1) of Division B.)
Directly connected means physically connected in such a way that water or gas cannot escape from the
connection.
Drainage system means an assembly of pipes, fittings, fixtures, traps and appurtenances that is used to
convey sewage, clear-water waste or storm water to a public sewer or a private sewage disposal system, but does not include subsoil drainage pipes. (See Figure A-1.4.1.2.(1)-F in Appendix A.)
Dual vent means a vent pipe that serves 2 fixtures and connects at the junction of the trap arms. (See
Figure A-1.4.1.2.(1)-F in Appendix A.)
Dwelling unit* means a suite operated as a housekeeping unit used or intended to be used as a domicile
by one or more persons and usually containing cooking, eating, living, sleeping and sanitary facilities.
Emergency floor drain means a fixture for the purposes of overflow protection that does not receive
regular discharge from other fixtures, other than from a trap primer. (See Appendix A.)
Fire separation* means a construction assembly that acts as a barrier against the spread of fire. Fire service pipe means a pipe that conveys water from a public water main or private water source to
the inside of a building for the purpose of supplying the fire sprinkler or standpipe systems.
Fixture means a receptacle, appliance, apparatus or other device that discharges sewage or clear-water
waste, and includes a floor drain.
Fixture drain means the pipe that connects a trap serving a fixture to another part of a drainage system. Fixture outlet pipe means a pipe that connects the waste opening of a fixture to the trap serving the
fixture. (See Figure A-1.4.1.2.(1)-H in Appendix A.)
Fixture unit (as applying to drainage systems) means the unit of measure based on the rate of
discharge, time of operation and frequency of use of a fixture that expresses the hydraulic load that is imposed by that fixture on the drainage system.
Fixture unit (as applying to water distribution systems) means the unit of measure based on the rate of
supply, time of operation and frequency of use of a fixture or outlet that expresses the hydraulic load that is imposed by that fixture or outlet on the supply system.
Flood level rim means the top edge at which water can overflow from a fixture or device. (See
Figure A-1.4.1.2.(1)-B in Appendix A.)
Flow control roof drain means a roof drain that restricts the flow of storm water into the storm drainage
system.
Fresh air inlet means a vent pipe that is installed in conjunction with a building trap and terminates
outdoors. (See Appendix Note A-2.4.5.4.(1) of Division B.)
Indirect service water heater* means a service water heater that derives its heat from a heating medium
such as warm air, steam or hot water.
Indirectly connected means not directly connected. (See Appendix Note A-2.3.3.11.(2) of Division B.) Individual vent means a vent pipe that serves one fixture.
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Nominally horizontal means at an angle of less than 45° with the horizontal. (See Figure A-1.4.1.2.(1)-J in
Appendix A.)
Nominally vertical means at an angle of not more than 45° with the vertical. (See Figure A-1.4.1.2.(1)-J in
Appendix A.)
Noncombustible* means that a material meets the acceptance criteria of CAN/ULC-S114, “Test for
Determination of Non-Combustibility in Building Materials.”
Occupancy* means the use or intended use of a building or part thereof for the shelter or support of
persons, animals or property.
Offset means the piping that connects the ends of 2 pipes that are parallel. (See Figure A-1.4.1.2.(1)-K in
Appendix A.)
Offset relief vent means a relief vent that provides additional air circulation upstream and downstream
of an offset in a soil-or-waste stack. (See Appendix Note A-2.5.4.4.(1) of Division B.)
Plumbing system* means a drainage system, a venting system and a water system or parts thereof. (See
Figure A-1.4.1.2.(1)-L in Appendix A.)
Potable means safe for human consumption.
Private sewage disposal system* means a privately owned plant for the treatment and disposal of sewage
(such as a septic tank with an absorption field).
Private use (as applying to the classification of plumbing fixtures) means fixtures in residences and
apartments, in private bathrooms of hotels, and in similar installations in other buildings for one family or an individual.
Private water supply system means an assembly of pipes, fittings, valves, equipment and appurtenances
that supplies water from a private source to a water distribution system.
Public use (as applying to the classification of plumbing fixtures) means fixtures in general washrooms
of schools, gymnasiums, hotels, bars, public comfort stations and other installations where fixtures are installed so that their use is unrestricted.
Relief vent means a vent pipe that is used in conjunction with a circuit vent to provide additional air
circulation between a drainage system and a venting system.
Riser means a water distribution pipe that extends through at least one full storey.
Residential full flow-through fire sprinkler/standpipe system means an assembly of pipes and fittings
installed in a one- or two-family dwelling that conveys water from the water service pipe to the sprinkler/standpipe systemʹs outlets and is fully integrated into the potable water system to ensure a regular flow of water through all parts of both systems.
Residential partial flow-through fire sprinkler/standpipe system means an assembly of pipes and fittings
installed in a one- or two-family dwelling that conveys water from the water service pipe to the sprinkler/standpipe systemʹs outlets and in which flow, during inactive periods of the
sprinkler/standpipe system, occurs only through the main header to the water closet located at the farthest point of the two systems.
Roof drain means a fitting or device that is installed in the roof to permit storm water to discharge into a
leader.
Roof gutter means an exterior channel installed at the base of a sloped roof to convey storm water. Sanitary building drain means a building drain that conducts sewage to a building sewer from the most
upstream soil-or-waste stack, branch or fixture drain serving a water closet.
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Sewage means any liquid waste other than clear-water waste or storm water.
Size means the nominal diameter by which a pipe, fitting, trap or other similar item is commercially
designated.
Soil-or-waste pipe or waste pipe means a pipe in a sanitary drainage system.
Soil-or-waste stack means a vertical soil-or-waste pipe that passes through one or more storeys, and
includes any offset that is part of the stack.
Stack vent means a vent pipe that connects the top of a soil-or-waste stack to a vent header or to outside
air. (See Figure A-1.4.1.2.(1)-F in Appendix A.)
Storage-type service water heater* means a service water heater with an integral hot water storage tank. Storey (as applying to plumbing) means the interval between 2 successive floor levels, including
mezzanine floors that contain plumbing fixtures, or between a floor level and roof.
Storm building drain means a building drain that conducts storm water and is connected at its upstream
end to a leader, sump or catch basin, and at its downstream end to a building sewer or a designated storm water disposal location.
Storm building sewer means a building sewer that conveys storm water. Storm drainage system means a drainage system that conveys storm water. Storm sewer means a sewer that conveys storm water.
Storm water means water that is discharged from a surface as a result of rainfall or snowfall. Subsoil drainage pipe means a pipe that is installed underground to intercept and convey subsurface
water.
Suite* means a single room or series of rooms of complementary use, operated under a single tenancy
and includes dwelling units, individual guest rooms in motels, hotels, boarding houses, rooming houses and dormitories, as well as individual stores and individual or complementary rooms for business and personal services occupancies.
Trap means a fitting or device that is designed to hold a liquid seal that will prevent the passage of gas
but will not materially affect the flow of a liquid.
Trap arm means that portion of a fixture drain between the trap weir and the vent pipe fitting. (See
Appendix Note A-2.5.6.3.(1) of Division B.)
Trap dip means the lowest part of the upper interior surface of a trap.
Trap seal depth means the vertical distance between the trap dip and the trap weir. (See Appendix
Note A-2.2.3.1.(1) and (3) of Division B.)
Trap standard means the trap for a fixture that is integral with the support for the fixture. Trap weir means the highest part of the lower interior surface of a trap. (See Appendix
Note A-2.2.3.1.(1) and (3) of Division B.)
Vacuum breaker (see back-siphonage preventer).
Vent header means a vent pipe that connects any combination of stack vents or vent stacks to outside
air. (See Figure A-1.4.1.2.(1)-I in Appendix A.)
Vent pipe means a pipe that is part of a venting system.
Vent stack means a vent pipe that is connected at its upper end to a vent header or that terminates in
outside air and is connected at its lower end to the waste stack at or below the lowest soil-or-waste pipe connection. (See Figure A-1.4.1.2.(1)-G in Appendix A.)
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Water distribution system means an assembly of pipes, fittings, valves and appurtenances that conveys
water from the water service pipe or private water supply system to water supply outlets, fixtures, appliances and devices.
Water service pipe means a pipe that conveys water from a public water main or private water source to
the inside of the building.
Water system means a private water supply system, a water service pipe, a water distribution system or
parts thereof.
Wet vent means a soil-or-waste pipe that also serves as a vent pipe and extends from the most
downstream wet-vented fixture connection to the most upstream fixture connection. (See Appendix Note A-2.5.8.1.(2) of Division B.)
Yoke vent means a vent pipe that is connected at its lower end to a soil-or-waste stack and at its upper
end to a vent stack or to a branch vent connected to a vent stack. (See Appendix Note A-2.5.4.3. of Division B.)
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OS Safety
An objective of this Code is to limit the probability that, as a result of the design or installation of the plumbing system, a person in or adjacent to the building or facility will be exposed to an unacceptable risk of injury.
OS1 Fire Safety
An objective of this Code is to limit the probability that, as a result of the design or installation of the plumbing system, a person in or adjacent to the building or facility will be exposed to an unacceptable risk of injury due to fire. The risks of injury due to fire addressed in this Code are those caused by—
OS1.1 - fire or explosion occurring OS2 Structural Safety
An objective of this Code is to limit the probability that, as a result of the design or installation of the plumbing system, a person in or adjacent to the building will be exposed to an
unacceptable risk of injury due to structural failure. The risks of injury due to structural failure addressed in this Code are those caused by—
OS2.1 - loads bearing on the building elements that exceed their load-bearing capacity OS3 Safety in Use
An objective of this Code is to limit the probability that, as a result of the design or installation of the plumbing system, a person in or adjacent to the building or facility will be exposed to an unacceptable risk of injury due to hazards. The risks of injury due to hazards addressed in this Code are those caused by—
OS3.1 - tripping, slipping, falling, contact, drowning or collision OS3.2 - contact with hot surfaces or substances
OS3.4 - exposure to hazardous substances OH Health
An objective of this Code is to limit the probability that, as a result of the design or installation of the plumbing system, a person will be exposed to an unacceptable risk of illness.
OH1 Indoor Conditions
An objective of this Code is to limit the probability that, as a result of the design or installation of the plumbing system, a person in the building or facility will be exposed to an unacceptable risk of illness due to indoor conditions. The risks of illness due to indoor conditions addressed in this Code are those caused by—
OH1.1 - inadequate indoor air quality
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of the plumbing system, a person in the building or facility will be exposed to an unacceptable risk of illness due to unsanitary conditions. The risks of illness due to unsanitary conditions addressed in this Code are those caused by—
OH2.1 - exposure to human or domestic waste OH2.2 - consumption of contaminated water OH2.3 - inadequate facilities for personal hygiene OH2.4 - contact with contaminated surfaces OH5 Hazardous Substances Containment
An objective of this Code is to limit the probability that, as a result of the design or installation of the plumbing system, the public will be exposed to an unacceptable risk of illness due to the release of hazardous substances from the building or facility.
OP Protection of the Building or Facility from Water and Sewage Damage OP5 Protection of the Building or Facility from Water and Sewage Damage
An objective of this Code is to limit the probability that, as a result of the design or installation of the plumbing system, the building or facility will be exposed to an unacceptable risk of damage due to the leakage of service water or sewage.
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Appendix A):
F01 To minimize the risk of accidental ignition.
F02 To limit the severity and effects of fire or explosions. F20 To support and withstand expected loads and forces. F21 To limit or accommodate dimensional change.
F30 To minimize the risk of injury to persons as a result of tripping, slipping, falling, contact, drowning or collision.
F31 To minimize the risk of injury to persons as a result of contact with hot surfaces or substances. F40 To limit the level of contaminants.
F41 To minimize the risk of generation of contaminants. F43 To minimize the risk of release of hazardous substances.
F45 To minimize the risk of the spread of disease through communal shower facilities. F46 To minimize the risk of contamination of potable water.
F62 To facilitate the dissipation of water and moisture from the building. F70 To provide potable water.
F71 To provide facilities for personal hygiene.
F72 To provide facilities for the sanitary disposal of human and domestic wastes. F80 To resist deterioration resulting from expected service conditions.
F81 To minimize the risk of malfunction, interference, damage, tampering, lack of use or misuse. F82 To minimize the risk of inadequate performance due to improper maintenance or lack of
maintenance.
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Provision: 2.1.1.1.(1)
Application
Application 1.
Design, installation, extension, alteration, renewal or repair of plumbing systems in buildings.Intent(s)
Intent 1.
To state the application of the this Part.Provision: 2.1.2.1.(1)
Objective
OH2Attributions
[F72-OH2.1]Application
Application 1.
Connection of sanitary drainage systems to public sanitary sewers, public combined sewers orprivate sewage disposal systems of buildings.
Intent(s)
Intent 1.
To limit the probability that sanitary waste will discharge into an inappropriate disposal system, which could lead to unsanitary conditions, which could lead to harm to persons.Provision: 2.1.2.1.(2)
Objective
OH2Attributions
[F72-OH2.1]Application
Application 1.
Installation of combined building drains, in buildings.Intent(s)
Intent 1.
To limit the probability that drainage systems will be overloaded, which could lead to raw sewage and storm water backing up into buildings, which could lead to flooding in buildings, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OP5
Attributions
[F72-OP5]Application
Application 1.
Installation of combined building drains, in buildings.Intent(s)
Intent 1.
To limit the probability that drainage systems will be overloaded, which could lead to raw sewage and storm water backing up into buildings, which could lead to flooding in buildings, which could lead to damage to the building or facility.Copyright
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Provision: 2.1.2.2.(1)
Objective
OP5Attributions
[F72-OP5]Application
Application 1.
Connection of storm drainage systems in buildings to public storm sewers, public combined sewers or designated storm water disposal locations.Intent(s)
Intent 1.
To limit the probability that storm water will be improperly disposed of, which could lead to flood-ing in buildflood-ings, which could lead to damage to the buildflood-ing or facility.Provision: 2.1.2.3.(1)
Objective
OH2Attributions
[F46-OH2.2]Application
Application 1.
Connection of water distribution systems in buildings to public water mains or private potablewater supply systems.
Intent(s)
Intent 1.
To limit the probability that water distribution systems in buildings will be connected to non-potable water sources, which could lead to the contamination of non-potable water distribution systems, which could lead to harm to persons.Provision: 2.1.2.4.(1)
Objective
OH2
Attributions
[F71-OH2.1, OH2.3] [F70-OH2.1]
Application
Application 1.
Connection of piping in a building to public services, with respect to the connection of piping of any other building.Exception: except for an ancillary building on the same property.
Intent(s)
Intent 1.
To limit the probability that an interruption of water and sanitary services to an adjacent building will lead to an interruption of services to the building, which could lead to the unavailability of wa-ter for drinking, bathing, washing or flushing of fixtures, which could lead to unsanitary conditions, which could lead to harm to persons.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Provision: 2.1.3.1.(1)
Objective
OH1
Attributions
[F40-OH1.1] Applies to the requirement for ventilation.
Application
Application 1.
Installation of plumbing fixtures in rooms that are not ventilated in accordance with the ap-propriate requirements in Parts 3 and 9 of the National Building Code of Canada.This applies to buildings.
Intent(s)
Intent 1.
To limit the probability that plumbing fixtures will be installed in locations that do not have suffi-cient ventilation, which could lead to a negative effect on indoor air quality, which could lead to harm to persons.Objective
OS3
Attributions
[F30-OS3.1] Applies to the requirement for lighting.
Application
Application 1.
Installation of plumbing fixtures in rooms that are not lighted in accordance with the appro-priate requirements in Parts 3 and 9 of the National Building Code of Canada.This applies to buildings.
Intent(s)
Intent 1.
To limit the probability that plumbing fixtures will be installed in locations that do not have suf-ficient lighting, which could lead to persons tripping, falling or bumping into fixtures, which could lead to harm to persons.Provision: 2.1.3.2.(1)
Objective
OH2
Attributions
[F40-OH2.1] [F41-OH2.4] [F71-OH2.3]
Application
Application 1.
Accessibility, with respect to use, cleaning and maintenance, of plumbing fixtures, appli-ances, interceptors, cleanouts, valves, devices or pieces of equipment, in buildings.Intent(s)
Intent 1.
To limit the probability that plumbing equipment will be inaccessible for maintenance, which could lead to blockages or failure, which could lead to flooding or leakage, which could lead to un-sanitary conditions, which could lead to harm to persons.Intent 2.
To limit the probability that plumbing equipment will be inaccessible for cleaning, which could lead to bacteria growth, which could lead to unsanitary conditions, which could lead to harm to per-sons.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Intent 3.
To limit the probability that plumbing equipment will be inaccessible, which could lead to un-availability for its intended use, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OH2
Attributions
[F82-OH2.1, OH2.2, OH2.3, OH2.4] Applies to the need for maintenance.
Application
Application 1.
Accessibility, with respect to maintenance, of plumbing fixtures, appliances, interceptors,cleanouts, valves, devices or pieces of equipment, in buildings.
Intent(s)
Intent 1.
To limit the probability that plumbing equipment will be inaccessible for maintenance, which could lead to failure of a trap seal or insufficient venting, which could lead to a negative effect on indoor air quality, which could lead to harm to persons.Objective
OH2
Attributions
[F71-OH2.3] [F81-OH2.4]
Application
Application 1.
Accessibility, with respect to use, cleaning and maintenance, of plumbing fixtures, appli-ances, interceptors, cleanouts, valves, devices or pieces of equipment, in buildings.Intent(s)
Intent 1.
To limit the probability that plumbing equipment will be inaccessible for use, which could lead to discomfort, which could lead to harm to persons.Intent 2.
To limit the probability that plumbing equipment will be inaccessible for maintenance, which could lead to persons coming in contact with damaged equipment [such as sharp edges, cracks, bro-ken or weabro-kened parts], which could lead to harm to persons.Objective
OP5
Attributions
[F81-OP5]Application
Application 1.
Accessibility, with respect to use, cleaning and maintenance, of plumbing fixtures, appli-ances, interceptors, cleanouts, valves, devices or pieces of equipment, in buildings.Intent(s)
Intent 1.
To limit the probability that plumbing equipment will be inaccessible for maintenance, which could lead to blockages or failure, which could lead to leakage or flooding, which could lead to dam-age to the building or facility.Intent 2.
To limit the probability that plumbing equipment will be inaccessible for use, which could lead to delays in accessing system controls such as shut-off and pressure-reducing valves, which could lead to excessive leakage or flooding, which could lead to damage to the building or facility.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Provision: 2.2.1.1.(1)
Objective
OH2
Attributions
[F80-OH2.1, OH2.2, OH2.3, OH2.4]
Application
Application 1.
Suitability of plumbing materials used in plumbing systems of buildings, where unusual con-ditions exist, such as excessively corrosive soil or water.Intent(s)
Intent 1.
To limit the probability that exposure to corrosive conditions will lead to premature failure of plumbing systems, which could lead to leakage or flooding, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OP5
Attributions
[F80-OP5]Application
Application 1.
Suitability of plumbing materials used in plumbing systems of buildings, where unusual con-ditions exist, such as excessively corrosive soil or water.Intent(s)
Intent 1.
To limit the probability that exposure to corrosive conditions will lead to premature failure of plumbing systems, which could lead to leakage or flooding, which could lead to damage to the build-ing or facility.Provision: 2.2.1.1.(2)
Objective
OH2Attributions
[F80-OH2.1]Application
Application 1.
Suitability of plumbing materials and equipment used in drainage systems of buildings, where excessively corrosive wastes are present.Intent(s)
Intent 1.
To limit the probability that exposure to corrosive waste will lead to premature failure of drainage systems, which could lead to persons being exposed to sewer wastes, sewer gases or toxic fumes, which could lead to harm to persons.Objective
OP5Attributions
[F80-OP5]Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Application
Application 1.
Suitability of plumbing materials and equipment used in drainage systems of buildings, where excessively corrosive wastes are present.Intent(s)
Intent 1.
To limit the probability that exposure to corrosive waste will lead to premature failure of drainage systems, which could lead to the unwanted escape of waste material, which could lead to damage to the building or facility.Provision: 2.2.1.2.(1)
Objective
OH2Attributions
[F70-OH2.2]Application
Application 1.
Re-use of materials and equipment in a potable water system of buildings, where such materials and equipment have been used for a purpose other than the distribution of potable water.Intent(s)
Intent 1.
To limit the probability that contaminated materials will be used, which could lead to the contam-ination of potable water systems, which could lead to harm to persons.Provision: 2.2.1.3.(1)
Application
Application 1.
Marking of plumbing pipe and fittings used in plumbing systems in buildings.Intent(s)
Intent 1.
To facilitate determination of compliance with the Code.Provision: 2.2.1.3.(2)
Application
Application 1.
Visibility of markings on plumbing pipe and fittings used in plumbing systems of buildings.Intent(s)
Intent 1.
To facilitate determination of compliance with the Code.Provision: 2.2.1.4.(1)
Application
Application 1.
Meaning of the terms pipe and piping in the National Plumbing Code of Canada.Intent(s)
Intent 1.
To clarify that all references to tube and tubing used in a plumbing system have the same meaning as pipe and piping, and are to be treated in the same manner for the purpose of applying the National Plumbing Code of Canada.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Provision: 2.2.1.5.(1)
Objective
OH2
Attributions
[F20, F81-OH2.1, OH2.3] [F46-OH2.2]
Application
Application 1.
Minimum design pressure for piping, fittings and joints used in pressure sewers, force mains or sump pump discharge applications.This applies to buildings.
Intent(s)
Intent 1.
To limit the probability that internal pressure will lead to the failure of piping, fittings and joints, which could lead to exposure of persons to sewer waste or gases, which could lead to harm to persons.Objective
OP5
Attributions
[F20-OP5]Application
Application 1.
Minimum design pressure for piping, fittings and joints used in pressure sewers, force mains or sump pump discharge applications.This applies to buildings.
Intent(s)
Intent 1.
To limit the probability that internal pressure will lead to the failure of piping, fittings and joints, which could lead to the leakage of liquids, which could lead to damage to the building or facility.Provision: 2.2.1.6.(1)
Objective
OH2Attributions
[F20, F81-OH2.3]Application
Application 1.
Working pressure rating of water service pipes serving buildings.Intent(s)
Intent 1.
To limit the probability that internal pressure will lead to the failure of water service pipes, which could lead to persons being exposed to water at a high pressure, which could lead to harm to persons.Objective
OP5Attributions
[F20-OP5]Application
Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Application 1.
Working pressure rating of water service pipes serving buildings.Intent(s)
Intent 1.
To limit the probability that internal pressure will lead to the failure of water service pipes, which could lead to the leakage of liquids, which could lead to damage to the building or facility.Provision: 2.2.2.1.(1)
Objective
OH2Attributions
[F41-OH2.4]Application
Application 1.
Surface finish of plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that fixture surfaces will be difficult to clean, which could lead to bacteria growth, which could lead to harm to persons.Provision: 2.2.2.2.(1)
Objective
OH2Attributions
[F80-OH2.1, OH2.4]Application
Application 1.
Plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that plumbing fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OS3
Attributions
[F80-OS3.1]Application
Application 1.
Plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that plumbing fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsafe conditions, which could lead to harm to persons.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Provision: 2.2.2.2.(2)
Objective
OH2Attributions
[F80-OH2.1, OH2.4]Application
Application 1.
Vitreous china plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that vitreous china fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OS3
Attributions
[F80-OS3.1]Application
Application 1.
Vitreous china plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that vitreous china fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsafe conditions, which could lead to harm to persons.Provision: 2.2.2.2.(3)
Objective
OH2Attributions
[F80-OH2.1, OH2.4]Application
Application 1.
Enamelled cast iron plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that enamelled cast iron fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsanitary con-ditions, which could lead to harm to persons.Objective
OS3
Attributions
[F80-OS3.1]Application
Application 1.
Enamelled cast iron plumbing fixtures used in buildings.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Intent(s)
Intent 1.
To limit the probability that enamelled cast iron fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsafe conditions, which could lead to harm to persons.Provision: 2.2.2.2.(4)
Objective
OH2Attributions
[F80-OH2.1, OH2.4]Application
Application 1.
Porcelain enamelled steel plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that porcelain enamelled steel fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OS3
Attributions
[F80-OS3.1]Application
Application 1.
Porcelain enamelled steel plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that porcelain enamelled steel fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsafe conditions, which could lead to harm to persons.Provision: 2.2.2.2.(5)
Objective
OH2Attributions
[F80-OH2.1, OH2.4]Application
Application 1.
Stainless steel plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that stainless steel fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsanitary conditions, which could lead to harm to persons.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Objective
OS3
Attributions
[F80-OS3.1]Application
Application 1.
Stainless steel plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that stainless steel fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsafe conditions, which could lead to harm to persons.Provision: 2.2.2.2.(6)
Objective
OH2Attributions
[F80-OH2.1, OH2.4]Application
Application 1.
Plastic plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that plastic fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OS3
Attributions
[F80-OS3.1]Application
Application 1.
Plastic plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that plastic fixtures will not meet proper standards, which could lead to such fixtures not performing in the way intended, which could lead to unsafe conditions, which could lead to harm to persons.Provision: 2.2.2.2.(7)
Objective
OH2Attributions
[F80, F41-OH2.1, OH2.4]Application
Application 1.
Hydromassage bathtub plumbing fixtures used in buildings.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Intent(s)
Intent 1.
To limit the probability that hydromassage bathtubs and associated equipment will not meet proper standards, which could lead to such tubs not performing in the way intended, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OS3
Attributions
[F71-OS3.1]Application
Application 1.
Hydromassage bathtub plumbing fixtures used in buildings.Intent(s)
Intent 1.
To limit the probability that hydromassage bathtubs and associated equipment will not meet proper standards, which could lead to such tubs not performing in the way intended, which could lead to unsafe conditions, which could lead to harm to persons.Provision: 2.2.2.2.(8)
Objective
OH2Attributions
[F71-OH2.3]Application
Application 1.
Macerating toilet systems for single bathrooms in buildings.Intent(s)
Intent 1.
To limit the probability that macerating toilet systems will not meet proper standards, which could lead to such systems not performing in the way intended, which could lead to unsanitary conditions, which could lead to harm to persons.Provision: 2.2.2.3.(1)
Objective
OH2Attributions
[F80-OH2.1]Application
Application 1.
Construction and arrangement of shower receptors, in buildings.Intent(s)
Intent 1.
To limit the probability that water will leak into building components through walls or floors, which could lead to bacteria growth, which could lead to harm to persons.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Objective
OP5
Attributions
[F80-OP5]Application
Application 1.
Construction and arrangement of shower receptors, in buildings.Intent(s)
Intent 1.
To limit the probability that water will leak into building components through walls or floors, which could lead to damage to the building or facility.Provision: 2.2.2.3.(2)
Objective
OH2Attributions
[F80-OH2.1]Application
Application 1.
Maximum number of shower heads served by a single shower drain, in buildings.Intent(s)
Intent 1.
To limit the probability that an excessive amount of water from shower heads will flow into a drain, which could lead to the drain overflowing, which could lead to water leakage into building components, which could lead to bacteria growth, which could lead to harm to persons.Objective
OP5
Attributions
[F40-OP5]Application
Application 1.
Maximum number of shower heads served by a single shower drain, in buildings.Intent(s)
Intent 1.
To limit the probability that an excessive amount of water from shower heads will flow into a drain, which could lead to the drain overflowing, which could lead to water leakage into building components, which could lead to damage to the building or facility.Provision: 2.2.2.3.(3)
Objective
OH2Attributions
[F45-OH2.1]Application
Application 1.
Sloping of shower floors and the location of shower drains, where two or more shower heads are served by a drain, in buildings.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Intent(s)
Intent 1.
To limit the probability that persons will be exposed to waste water from adjacent showers being used by other persons, which could lead to the spread of disease, which could lead to harm to persons.Provision: 2.2.2.3.(4)
Objective
OH2Attributions
[F45-OH2.1]Application
Application 1.
The minimum horizontal distance between two adjacent shower heads, when a battery of shower heads is installed.Exception: except for column showers. This applies to buildings.
Intent(s)
Intent 1.
To limit the probability that persons will be exposed to waste water from adjacent showers being used by other persons, which could lead to the spread of disease, which could lead to harm to persons.Application
Application 1.
Column showers in buildings.Intent(s)
Intent 1.
To exempt column showers from the minimum horizontal distance requirements of Sen-tence 2.2.2.3.(4) since the inherent circular installation of the heads [on the column] will maintain spray separation.Provision: 2.2.2.4.(1)
Objective
OH2Attributions
[F41, F81-OH2.1, OH2.4]Application
Application 1.
Concealed overflows for dishwashing sinks and food preparation sinks used in buildings.Intent(s)
Intent 1.
To limit the probability that contaminated overflows [from food debris] will not be identified, cleaned and disinfected, which could lead to the contamination of food and utensils, which could lead to harm to persons.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Provision: 2.2.2.5.(1)
Objective
OH2Attributions
[F45-OH2.4]Application
Application 1.
Type of water closet fixture and seat, where a water closet is installed in a washroom forpublic use.
This applies to buildings.
Intent(s)
Intent 1.
To limit the probability that persons using the fixture will contact the contaminated front of the fixture, which could lead to the spread of disease, which could lead to harm to persons.Provision: 2.2.3.1.(1)
Objective
OH1Attributions
[F81, F40-OH1.1]Application
Application 1.
Depth, design and sealing of traps, in plumbing systems in buildings.Exception: except as stated in Sentence 2.2.3.1.(2), which applies to acid waste systems.
Intent(s)
Intent 1.
To limit the probability that inertia of the water flow [pressure differential] and evaporation, or malfunction of mechanical devices, will lead to the failure of trap seals, which could lead to the leakage of sewer gases into the building, which could lead to a negative effect on indoor air quality, which could lead to harm to persons.Intent 2.
To limit the probability that leakage from the failure of trap seals will not be identified and cor-rected, which could lead to the leakage of sewer gases into the building, which could lead to a negative effect on indoor air quality, which could lead to harm to persons.Provision: 2.2.3.1.(2)
Objective
OH1Attributions
[F81-OH1.1]Application
Application 1.
Minimum trap seal depth on fixtures draining to acid waste systems, in buildings.Intent(s)
Intent 1.
To modify the requirements of Sentence 2.2.3.1.(1) [specifically Clause 2.2.3.1.(1)(a)], which would otherwise permit a lesser depth, on the basis that a greater minimum trap seal depth will provide ad-ditional protection where exposure to acid gases is possible in an acid waste system. This [greater sealCopyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
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pour
tous
pays
depth] is to limit the probability that inertia of the water flow [pressure differential] and evaporation, or malfunction of mechanical devices, will lead to the failure of trap seals, which could lead to the leakage of sewer gases into the building, which could lead to a negative effect on indoor air quality, which could lead to harm to persons.
Provision: 2.2.3.1.(3)
Objective
OH2
Attributions
[F81-OH2.1, OH2.3, OH2.4]
Application
Application 1.
Traps that serve lavatories, sinks or laundry trays, in buildings.Intent(s)
Intent 1.
To limit the probability that traps will not be cleaned, which could lead to the accumulation of solids in the trap, which could lead to blockage of the trap, which could lead to waste water backing up, overflowing and flooding, which could lead to unsanitary conditions, which could lead to harm to persons.Objective
OP5Attributions
[F81-OP5]Application
Application 1.
Traps that serve lavatories, sinks or laundry trays, in buildings.Intent(s)
Intent 1.
To limit the probability that traps will not be cleaned, which could lead to the accumulation of solids in the trap, which could lead to blockage of the trap, which could lead to overflowing and flooding, which could lead to damage to the building or facility.Provision: 2.2.3.1.(4)
Objective
OH1Attributions
[F81-OH1.1]Application
Application 1.
Installation of bell traps, in drainage systems for buildings.Intent(s)
Intent 1.
To limit the probability that traps will not be properly sealed, which could lead to the leakage of sewer gases into the building, which could lead to harm to persons.Copyright
©
NRC
1941
- 2019
World
Rights
Reserved
©
CNRC
1941-2019
Droits
réservés
pour
tous
pays
Provision: 2.2.3.1.(5)
Objective
OH1Attributions
[F81-OH1.1]Application
Application 1.
Use of drum traps as fixture traps.Exception:except when required to serve as an interceptor and access for servicing is provided. This applies to buildings.
Intent(s)
Intent 1.
To limit the probability that leakage from the failure of certain trap seals will not be identified and corrected, which could lead to the leakage of sewer gases into the building, which could lead to harm to persons.Provision: 2.2.3.2.(1)
Objective
OH2
Attributions
[F81-OH2.1, OH2.3, OH2.4]
Application
Application 1.
Design of interceptors with regards to cleaning. This applies to buildings.Intent(s)
Intent 1.
To limit the probability that interceptors will not be cleaned, which could lead to the accumulation of material in the interceptor, which could lead to the blockage of flow or the failure to intercept waste materials, which could lead to waste water backing up, which could lead to unsanitary conditions, which could lead to harm to persons.Provision: 2.2.3.2.(2)
Objective
OH2
Attributions
[F81-OH2.1, OH2.3, OH2.4] [F46-OH2.2]
