GF Piping Systems PVC True Union Ball Valve with Full Port, Two Piece, PTFE Seat, EPDM Seal, 1/2" Socket/NPT Threaded PVC body for less weight than valves made from metals True union construction for in-place valve replacement Full port flow for higher operating efficiency than standard port Inline valve for connecting two pipes going in the same direction Socket weld connections to allow for a smooth bore and better fluid flow