1)The words and terms
in italics in this Code shall have the following meanings (an asterisk
(*) following a defined word or term indicates that the definition
for that word or term is taken from the NBC):
Additional circuit ventmeans a vent pipe that is installed between a circuit vent and a relief
vent to provide additional air circulation.
Air admittance valvemeans 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 breakmeans 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 gapmeans 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 zincmeans 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.)
Backflowmeans a flowing back or reversal
of the normal direction of the flow.
Backflow preventermeans a device or
a method that prevents backflow. (See Figure A-1.4.1.2.(1)-A in Appendix A.)
Back-siphonagemeans 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 valvemeans a check valve designed for use in a gravity drainage system.
Bathroom groupmeans
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.
Branchmeans a soil-or-waste pipe connected at its upstream end to the junction
of 2 or more soil-or-waste pipes or
to a 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 ventmeans 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.
Building drainmeans
the lowest horizontal piping, including any vertical offset, that conducts sewage, clear-water waste or storm water by gravity to a building
sewer. (See Figure A-1.4.1.2.(1)-F in Appendix A.)
Building sewermeans 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 trapmeans 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 valvemeans a valve that permits
flow in one direction but prevents a return flow.
Circuit ventmeans 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 system's 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 3 fire sprinkler/standpipe system
means an assembly of pipes and fittings
that conveys water from the water service pipe to the sprinkler/standpipe system's 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 system's 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 system's 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 system's 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.
Cleanoutmeans an access provided in drainage and venting
systems to provide for cleaning and inspection services.
Clear-water wastemeans 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 sewermeans a sewer that is
intended to conduct sewage and storm water.
Combustible*means that a material fails
to meet the acceptance criteria of CAN/ULC-S114, “Test
for Determination of Non-Combustibility in Building Materials.”
Continuous ventmeans a vent pipe that
is an extension
of a vertical section of a branch or fixture drain. (See Figure A-1.4.1.2.(1)-E in Appendix A.)
Critical levelmeans the level of submergence
at which the back-siphonage preventer ceases to prevent back-siphonage.
Dead endmeans a pipe that terminates
with a closed fitting.
Developed lengthmeans the length along
the centre line of the pipe and fittings. (See Appendix Note A-2.5.6.3.(1) of Division B.)
Directly connectedmeans physically
connected in such a way that water or gas cannot escape from the connection.
Drainage systemmeans 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 ventmeans 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 drainmeans 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 pipemeans
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.
Fixturemeans a receptacle, appliance,
apparatus or other device that discharges sewage or clear-water waste, and includes
a floor drain.
Fixture drainmeans the pipe that connects
a trap serving a fixture to another part of a drainage system.
Fixture outlet pipemeans 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 rimmeans 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.)
Fresh air inletmeans 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.)
Interceptormeans a receptacle that
is installed to prevent oil, grease, sand or other materials from
passing into a drainage system.
Leadermeans a pipe that is installed
to carry storm water from a roof to a storm building drain or sewer or other place of disposal.
Nominally horizontalmeans at an angle
of less than 45° with the horizontal. (See Figure A-1.4.1.2.(1)-J in Appendix A.)
Nominally verticalmeans 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.
Offsetmeans 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 ventmeans
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.)
Potablemeans safe for human consumption.
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 systemmeans 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 ventmeans 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.
Risermeans 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
system's 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 system's 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 drainmeans a fitting or device
that is installed in the roof to permit storm
water to discharge into a leader.
Roof guttermeans an exterior channel
installed at the base of a sloped roof to convey storm water.
Sanitary building drainmeans 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.
Sewagemeans any liquid waste other
than clear-water waste or storm water.
Sizemeans the nominal diameter by which
a pipe, fitting, trap or other similar item
is commercially designated.
Soil-or-waste stackmeans a vertical soil-or-waste pipe that passes through one
or more storeys, and includes any offset that is part of the stack.
Stack ventmeans 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.)
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 drainmeans 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 watermeans water that is discharged
from a surface as a result of rainfall or snowfall.
Subsoil drainage pipemeans 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.
Trapmeans 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 armmeans 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 dipmeans the lowest part of the
upper interior surface of a trap.
Trap seal depthmeans 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 standardmeans the trap for a fixture that is integral
with the support for the fixture.
Trap weirmeans 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.)
Vent headermeans 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 pipemeans a pipe that is part
of a venting system.
Vent stackmeans 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 soil-or-waste stack at or below the lowest soil-or-waste pipe connection. (See Figure A-1.4.1.2.(1)-G in Appendix A.)
Venting systemmeans an assembly of
pipes and fittings that connects a drainage
system with outside air for circulation of air and the protection
of trap seals in the drainage system. (See Figure A-1.4.1.2.(1)-G in Appendix A.)
Water distribution systemmeans 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 pipemeans a pipe that
conveys water from a public water main or private water source to
the inside of the building.
Water systemmeans a private water supply system, a water
service pipe, a water distribution system or parts thereof.
Wet ventmeans 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 ventmeans 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.)
This information has been archived because it is outdated and no longer relevant.