Air Admittance Vents

1-1/2" TRAP AIR VENT

Automatic Plumbing Air Admittance Vent (1-1/2" MPT) Automatic plumbing vent permits air to enter drain line to prevent siphonage. Seal closes as drainage stops to prevent sewer gas from entering home. For use with sinks, tubs showers, washing machines,...

Small Air Admittance Valve (Ayrlett) (20 DFU 1-1/2" or 2" Pipe) Fits 1-1/2″ and 2″ Pipe sizes. Vents up to 160 DFU on a branch and up to 20 DFU on a stack. Can be used as an individual, branch, circuit or stack vent.