Oatey® Sure-Vent® Air Admittance Valve, 2 x 3 in Nominal, NPT End Style, -40 to 150 deg F, 160 DFU Flow Rate, 1.88 in Inlet to Outlet Length, PVC Body, 6.09 in H, Domestic
Oatey® Sure-Vent® 160 DFU Capacity Air Admittance Valve's one-way valve is designed to allow air to enter the plumbing drainage system when negative pressures develop in the piping system.