PROFLO PROFLO 1-1/2" ABS Sch 40 Adapter Air Admittance Valve (Sold in quantities of 6) For Venting 2" DWV And Smaller

Product Features: 6 DFU 1-1/2" Sch 40 adapter For venting 2" DWV and smaller Includes screening on air inlets to protect the seal Made in USA ASTM Specifications : ASTM D-2665|ASTM D-2661 Constructed of ABS - a polypropylene blend NSF Certified NSF Specifications : NSF 14 Quantity: 6