Week 8 Flashcards
(15 cards)
A pipe installed to vent a fixture trap and that connects with the vent system above the fixture served or terminates in the open air.
Individual Vent
A vent that connects to a horizontal drainage branch and vents two traps to not more than eight traps or trapped fixtures connected into a battery
Circuit Vent
A specially designed system
of waste piping embodying the horizontal wet venting of one or more sinks, lavatories, drinking fountains or floor drains by means of a common waste and vent pipe adequately sized to provide free movement of air above the flow line of the drain.
Combination waste and vent system
A vent connecting at the junction of two fixture drains or to a fixture branch and serving as a vent for both fixtures
Common vent
One-way valve designed to allow air to enter the plumbing drainage system when negative pressures develop in the piping system. The device shall close by gravity and seal the vent terminal at zero differential pressure (no-flow conditions) and under positive internal pressures. The purpose of an air admittance valve is to provide a method of allowing air to enter the plumbing drainage system without the use of a vent extended to open air and to prevent sewer gases from escaping into a building,
Air admittance valve
A general term for any vertical line of soil, waste, vent or inside conductor piping that extends through not fewer than one story with or without offsets
Stack
The extension of a soil or waste stack above the highest horizontal drain connected to the stack.
Stack vent
A vent whose primary function is to provide circulation of air between drainage and vent systems
Relief vent
A method of venting a fixture or fixtures through the soil or waste
stack.
Stack venting
A pipe connecting upward from a soil or waste stack to a vent stack for
the purpose of preventing pressure changes in the stacks
Yoke vent
A vertical vent pipe installed primarily for the purpose of providing
circulation of air to and from any part of the drainage system.
Vent stack
A pipe or pipes installed to provide a flow of air to or from a drainage system, or to provide a circulation of air within such system to protect trap seals from siphonage and backpressure
Vent system
A drainage branch pipe extending laterally from a soil or waste stack or building drain, with or without vertical sections or branches, that receives the discharge from two or more fixture drains or branches and conducts the discharge to the soil or waste stack or to the building drain.
Horizontal branch drain
Any part of the piping system except a riser, main or stack.
Branch
A vent connecting one or more individual vents with a vent stack
or stack vent
Branch vent
