NIBCO 4 in. PVC DWV Hub x Hub Repair Coupling

DWV is used for non-pressurized sanitary system Drain, Waste, and Vent. There are two types of DWV plastic: ABS (black plastic) and PVC (white plastic). The sanitary drainage and vent piping are installed to remove waste water and water-borne wastes from the plumbing fixtures and appliances. DWV also provides a circulation of air within the drainage piping. ABS (black) and PVC (white) plastic pipe and fittings have identical uses.|Repair coupling is furnished without center stop and splices stationary lengths of PVC-DWV piping|Solvent welded connections|PVC requires a primer before cementing|Solvent-welded connections|ASTM D2665 and D3311|UL Listed 94V-0