Easy-tap closet flange is a premium, durable closet flange available in a variety of materials and styles, offering thehighest level of performance. The easy-tap has a patent-pending design where the test cap breaks out easily and cleanly, eliminating the possibility of falling down the DWV line. Solvent weld over 3" Sch. 40 DWV pipe or inside 4" Sch. 40DWV pipe.. IAPMO Listed. Meets ASTN D 2665, 2661.