The 700XLFP High Capacity Dual Check Valve used in low health hazard, non-potable applications for protection against both back siphonage and backpressure of polluted water. It is commonly used in residential fire sprinkler applications when deemed acceptable by the jurisdiction of the local authorities. The 700XLFP may be installed vertically or horizontally, and includes a 1-1/2 in female union inlet x 1-1/2 in female outlet connection for versatile installation. Features include corrosion-resistant stainless steel springs and cast bronze main valve body, a maximum pressure of 175 psi and a maximum temperature of 180 degF.