Get this Oatey Sure-Vent PVC Air Admittance Valve with 160 DFU Branch & 24 DFU Stack delivered onsite. Complies to ASSE standard 1050 and 1051. For use as a secondary vent. 1-size approved to handle up to 3 in. vent pipe. Opens/closes as needed by building’s plumbing system. 20-DFU AAV with 1-1/2 in. x 2 in. PVC sch. 40-adapter. At zero pressure the sure-vent AAV is sealed, ready to react to pressure changes.

Get this Oatey Sure-Vent PVC Air Admittance Valve with 160 DFU Branch & 24 DFU Stack delivered onsite. Complies to ASSE standard 1050 and 1051. For use as a secondary vent. 1-size approved to handle up to 3 in. vent pipe. Opens/closes as needed by building's plumbing system. 20-DFU AAV with 1-1/2 in. x 2 in. PVC sch. 40-adapter. At zero pressure the sure-vent AAV is sealed, ready to react to pressure changes.