Asahi/America has expanded its offering of PVC wafer check valves to include sizes 4-in., 6-in, and 8-in. The valve's body, disc and stopper assembly are machined from solid PVC plate stock, which conforms to ASTM D1784 Cell Classification 12454A. It is available in PVC, 4-in. through 12-in. with EPDM seals and no spring standard, and operates at a maximum pressure of 150 psi, while 10-in. and 12-in valves operate at 90 psi and up to 120 ºF.