Canada Plumbing code 2020 Defined terms 2nd year AIT exam

Air admittance valve

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.

Air Break (Drainage System)

The unobstructed vertical distance between the lowest point of an indirectly connected sanitary drainage pipe and the flood level rim of the fixture into which it discharges.

Air Gap

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.

Backflow

a flowing back or reversal of the normal direction of the flow.

Backflow Preventer

a device or a method that prevents backflow.

Back Pressure

pressure higher than the supply pressure.

Back Siphonage

backflow caused by a negative pressure in the supply system.

Back siphonage preventer (Vacuum breaker)

a device or a method that prevents back-siphonage.

Backwater valve

a check valve designed for use in a gravity drainage system

Bathroom Group

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

a sanitary drainage pipe connected at its upstream end to the junction of 2 or more sanitary drainage pipes or to a stack, and connected at its downstream end to another branch, a sump, a stack or a building drain.

Branch Vent

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.

Building Drain

means the lowest horizontal piping, including any vertical offset, that conducts sewage, clear-water waste or storm water by gravity to a building sewer.

Clean out

an access provided in drainage and venting systems to provide for cleaning and inspection services.

Clear water waste

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.

Combined building drain

a building drain that is intended to conduct sewage and storm water.

Combined building sewer

building sewer that is intended to conduct sewage and storm water.

Combined Sewer

a sewer that is intended to conduct sewage and storm water.

Continuous Vent

a vent pipe that is an extension of a vertical section of a branch or fixture drain.

dead end

a pipe that terminates with a closed fitting.

Critical Level

the level of submergence at which the back-siphonage preventer ceases to prevent back-siphonage.

Developed length

The length along the centre line of the pipe and fittings.

Directly connected

physically connected in such a way that water or gas cannot escape from the connection.

Drainage system

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.

dual Vent

a vent pipe that serves 2 fixtures and connects at the junction of the trap arms.

Dwelling unit

a suite operated as a housekeeping unit, used or intended to be used by one or more persons and usually containing cooking, eating, living, sleeping and sanitary facilities.

Emergency floor drain

a fixture for the purposes of overflow protection that does not receive regular discharge from other fixtures, other than from a trap primer.

Fire separation

a construction assembly that acts as a barrier against the spread of fire

Fixture

a receptacle, appliance, apparatus or other device that discharges sewage or clear-water waste, and includes a floor drain.

Fixture drain

the pipe that connects a trap serving a fixture to another part of a drainage system.

Fixture unit (Drainage system)

(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.

Flood Level Rim

the top edge at which water can overflow from a fixture or device.

Indirectly Connected

not directly connected.

Indirect service water heater

a service water heater that derives its heat from a heating medium such as warm air, steam or hot water.

Individual vent

a vent pipe that serves one fixture.

Leader

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 horizontal

At an angle of less than 45° with the horizontal.

Nominally vertical

at an angle of not more than 45° with the vertical.

Riser

a water distribution pipe that extends through at least one full storey.

Sanitary building drain

a building drain that conducts sewage to a building sewer from the most upstream stack, branch or fixture drain serving a water closet.

Sanitary building sewer

a building sewer that conducts sewage.

Service water heater

a device for heating water for plumbing services.

Sanitary drainage system

means a drainage system that conducts sewage.

Sanitary sewer

a sewer that conducts sewage.

Sewage

any liquid waste other than clear-water waste or storm water.

Stack

a vertical sanitary drainage pipe that passes through one or more storeys, and includes any offset that is part of the stack.

Storey

for the purposes of this Code, 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

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

a building sewer that conveys storm water.

Storm drainage system

a drainage system that conveys storm water.

Storm sewer

A sewer that conveys storm water.

Storm water

water that is discharged from a surface as a result of rainfall or snowfall.

Subsoil drainage pipe

a pipe that is installed underground to intercept and convey subsurface water

Trap

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

portion of a fixture drain between the trap weir and the vent pipe fitting.

Trap dip

the lowest part of the upper interior surface of a trap.

Trap seal depth

the vertical distance between the trap dip and the trap weir.

Trap standard

the trap for a fixture that is integral with the support for the fixture.

Trap weir

the highest part of the lower interior surface of a trap.

Vacuum breaker

a device or a method that prevents back-siphonage.

Vent header

a vent pipe that connects any combination of stack vents or vent stacks to outside air.

Venting system

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.

Vent pipe

a pipe that is part of a venting system

Water distribution system

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

a pipe that conveys water from a public water main or private water source to the inside of the building.