L-P-320B, FEDERAL SPECIFICATION, PIPE AND FITTINGS, PLASTIC (POLYVINYL CHLORIDE, PVC, DRAIN, WASTE, AND VENT, DWV) (8 MAR 1973)

L-P-320B, FEDERAL SPECIFICATION, PIPE AND FITTINGS, PLASTIC (POLYVINYL CHLORIDE, PVC, DRAIN, WASTE, AND VENT, DWV) (8 MAR 1973)., This specification covers polyvinyl chloride (PVC) drain, waste, and vent (DWV) pipe and fittings.