The 375AST Reduced Pressure Principle Backflow Assembly is utilized in high hazard applications for all applications and market segments, protecting against backsiphonage and backpressure of contaminated water into the potable water supply. The 375AST offers lightweight design with a high quality, 304L grade stainless steel valve body and sensing line, plus stainless steel internals, fasteners, and springs. Multiple options for end connections, such as NRS, OS&Y, and Butterfly shut-off valves, offer supreme installation versatility, and its corrosion-resistant design saves you money on maintenance costs.