Cheater Vent Under Kitchen Sink

Locating the valve in a sink or vanity cabinet is acceptable.

Cheater vent under kitchen sink.

In new construction this is done by plumbing vent pipes off of all drain lines and running the vent pipes to the roof of the building. Pvc sink drain plumbed with a standard vent pipe venting to the roof for standard wastewater drain pipes to function properly in a residential plumbing system there must be adequate venting. Remove your check vent set a pail underneath the pipe and then run water into your drain again. If you live in such a community and your existing vent fails installing an aav is an easy alternative to.

Cheater vent tee female threaded adapter 90 degree elbow primer cement saw. The vent shall connect to the drain vertically to maintain an unobstructed opening in the piping to the studor aavs. Some communities allow you to vent sinks with an air admittance valve or cheater vent. A maximum deviation in either direction for plum of 15 degrees is allowed.

The appropriate coupling for the aav glued or threaded attaches to the tee. Check the manufacturer s instructions and local codes to determine the proper height for the aav above the drain. If your drain gurgles runs slow or hisses the problem may or may not be your check vent. Draw vents or cheater vents as they are commonly referred to are often installed by home owners where a wall or ceiling would have to be broken open to run the separate vent pipe to the main stack or where it would necessitate installing another stack as when a new bath is added at the other side of the home from the original.

Install the pvc drain line the sanitary tee and the p trap for sink. How to install a cheater vent supply list. In this video i talk about a cheater vent that is sometimes used in plumbing systems. If you drain backs up and you see waste water underneath your sink your check vent may be leaking and should be replaced.

Air admittance valves aav open and close in conjunction with normal dwv system operation effectively eliminating the need for secondary vent pipes.