H71 Check Valve: Good Quality but LOW price Size: 1/2"- 8" Also do OEM service. ... disc off tour short, and there are spring loaded, closing speed, can significantly reduce the hammer. Products to its ... link of water, oil, air, gas and otherpipeline.The price is very low,and the quality is excellent.We believe ... ,we can providemalleable pipe fittings OEM service. Low Price Vertical Lift Check Valve