True Union ball check valves with natural PVDF from Hayward Flow Control extend the range of applications and services where the valves can be installed, including higher temperature services, extreme corrosive media, and high purity systems. The ball is made from solid PTFE and sizes include 1/4 through 1 inch. All sizes carry a pressure rating of 150 psi at 70 degrees F, and maximum service temperature is 240 degrees F. The valves are ideal for vertical installations and have a square-cut seat for positive sealing. 888-429-4635; www.haywardflowcontrol.com