Asahi America Pool-Pro® 5437.840 4" Butterfly Valve Lever and Gear, PVC/EPDM. All Pool-Pro® Type SP butterfly valves, sizes 1-1/2"-12", shall be of a PVC body, PVC disc and EPDM construction suitable for chlorinated water applications. Stem shall be of S32101 stainless steel and non-wetted. Valves shall be a self-gasketing design with a convex sealing arrangement. All Pool-Pro® Type SP (1-1/2"-10") valves shall be rated to 150 PSI and size (12") 100 PSI at 70°F, as manufactured by Asahi/America, Inc.