MIFAB® CL-SS Series (specify size) piston operated water hammer arrestor with hard drawn stainless steel body, RYTON PPS piston with double o-rings (Parco # 5778-80) and CDA 360 brass M.P.T. connection. Certified to the ASSE 1010-1996 and ANSI A112.26.1M Standards. Engineered to limit the system surge pressure up to 1,500 psi.