Air admittance valves provide an alternative to secondary venting when utilized within the scope of model plumbing codes, referenced standards, and Oatey installation instructions. AAVs provide the ideal venting solution for island sinks, remote bathroom groups, and remodeling jobs by eliminating the need to tie into a stack vent. 1-1/2″ PVC. No. 39239: Size: 1-1/2″ Solvent Weld, Material: PVC, Pkg Qty: 1
