160 DFU Sure-Vent Air Admittance Valve w/ 2" x 3" PVC Adapter, Complies with ASSE Standard 1050 and 1051, for use as a secondary vent
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Q:Can this be used in an external drain pipe from my sump pump
A:Sure-Vent AAVs are intended for installation within the confines of the building structure, not exposed to outside elements.