ss Check Valve: 1.Good Quality but LOW price 2.Size: 1/2"- 8" 3.OEM service ... of standard:H71H/Y/W2 Usage and features: connection with wafer H71 check valve, compact disc along the center ... reduce the hammer. Products to its small size, light weight, nimble, sealing a reliable,easy installation, particularly suitable for ... the power of HONESTY. Stainless Steel Wafer Check Valve with Low Price