About This Compact air admittance valve with PVC adapter Ideal for a single fixture or group of fixtures; capacity of 160 DFUs (drain fixture units) on a branch and 24 DFUs on a stack Creates ventilation that prevents the loss of water seals in traps; uses gravity to automatically close seal and prevent circulation of unpleasant bathroom or drain odors Fits 1-1/2- and 2-inch piping; temperature rating of -40°F to 150°F (-40°C to 65.6°C); complies to ANSI/ASSE 1050 and 1051; this style air admittance valve is not recognized as a mechanical vent in the International Building Code Exclusive vermin protection system keeps out bugs and foreign objects Overview Material : Pvc Brand : WELD-ON Item dimensions L x W x H : 3.5 x 3.5 x 6 inches Exterior Finish : Pvc Inlet Connection Type : Barb Outlet Connection Type : Barb Number of Ports : 1 Outlet Connection Size : 2 Inches Specification Met : ansi/asse Global Trade Identification Number : 00764651203417