Asahi/America, Inc. introduces 10-inch and 12-inch PVC wafer check valves. Wafer check valves are installed on the discharge side of pumps in applications such as aquariums, water attractions, water treatment and municipalities to prevent back-flow flooding that could seriously damage pump systems. Asahi’s new wafer check valve’s body, disc and stopper assembly are machined from solid PVC plate stock, which conforms to ASTM D1784 Cell Classification 12454A. This material was selected based on its excellent chemical resistance and mechanical properties, according to the manufacturer. The wafer check valves are machined, assembled and tested at Asahi/America’s corporate headquarters in Malden, Mass.