The Fluid Controls CV-600-HSSB check valve prevents backflow in systems moving fluids. It is constructed with stainless steel to provide superior corrosion resistance. O-ring is made with Viton. Connections measure 3/8 Inch FxF. Endures a maximum pressure of 3500 PSI. Requires 10 PSI to open. Tolerates a maximum flow rate of 8 GPM.