U.S. Plastic Corp.® has a great selection of true union ball valves. The term true union means that the carrier or main part of the valve can be removed from the piping system and be either repaired or replaced. Most of our valves have all plastic construction. They will never rust or corrode and they can survive corrosive environments without the need for painting or expensive epoxy coatings. Check out our selection of true union ball valves from many brands including George-Fischer, Asahi®, Hayward®, Nibco®, Spears® and many more.