Closet Flange-Cap Pvc 3In Designed to connect a water closet outlet to a plumbing system and sit flush with the floor. 3" Inside Fit Closet Flange solvent welds inside 3" Sch. 40 DWV pipe. Extra Thick Flange with 4 mounting slots. Four countersunk screw holes provide secure attac hment to floor. Flange sits flush on floor.