The AllPoints Foodservice Parts & Supplies 56-1150 Back Flow Preventer is designed to ensure safe and efficient water flow in your plumbing system. Featuring a 3/4" FPT union, this unit operates effectively at temperatures up to 250°F and withstands pressures of 175 PSI. It includes an atmospheric vent for optimal performance and is a reliable replacement for Watts model 9D-(3/4) (ICS item H593). Ideal for maintaining water quality and preventing contamination, this back flow preventer is a crucial component for any foodservice operation.