Plastic pipe fittings, namely water pipe insert for controlling air volume in water; non-metal pipe fittings, namely, water pipe inserts; non-metal pipe fittings, namely, water pipe insert for controlling air volume in water; water-pipe valves, not of metal or plastic

Plastic pipe fittings, namely water pipe insert for controlling air volume in water; non-metal pipe fittings, namely, water pipe inserts; non-metal pipe fittings, namely, water pipe insert for controlling air volume in water; water-pipe valves, not of metal or plastic