Plastic pipes for plumbing purposes and fittings therefor, namely, plastic pipe connectors; plastic jointing sleeves, plastic conduit for plumbing use, gaskets, jackets, muffs, reducers, adaptors, elbows, washers, o-rings, socket reducers, pipe tees, blanking plugs, pipe sleeves, pipe clips, blanking caps, grab rings, conduit junction boxes, conduit terminals and manifolds, all non-metallic