Febco 825Y
The Model 825Y reduced pressure backflow prevention assembly consists of two independently operating, center guided, spring loaded "Y" pattern check valves and one hydraulically dependent differential relief valve. The assembly automatically reduces the pressure in the "zone" between the check valves to at least 5 psi lower than the inlet pressure. If the differential between upstream and the zone of the unit drops to 2 psi, the differential relief valve will open and maintain the proper differential. Standard features of the Model 825Y include the "Y" body design for low pressure loss, reliable operating, and easy serviceability. At the typical design flow rates of 0 to 7.5 feet per second the 825Y has one of the lowest head losses in the industry.