1.1 This specification covers poly(vinyl chloride) (PVC) Schedule 40 pipe fittings. Included are requirements for materials, workmanship, dimensions, and burst pressure. This specification covers poly(vinyl chloride) (PVC) Schedule 40 pipe fittings made from four PVC plastic compounds and intended for use with Iron Pipe Size (IPS) outside-diameter plastic pipe. Fittings fabricated by welding are not included in this sp