The Febco 710 Series 1-1/4 inch Atmospheric Vacuum Breaker (AVB) protects potable water systems from backsiphonage. Built with a bronze body and lightweight plastic poppets, this AVB is designed for non-continuous pressure applications where positive vacuum protection is required. Bronze body and bonnet for corrosion resistance and long service life. Lightweight, serviceable plastic poppets with resilient rubber discs for positive closure. Female NPT inlet and outlet - easy threaded installation on 1-1/4 in. fittings. Maximum working pressure 150 psi (10.3 bar); recommended water temperature 32 to 110 F (0 to 43 C). Internal parts are serviceable in line from the top of the unit; repair kits are available for poppets and bonnets. Ideal for hose bibs, turf irrigation, chemical vats, X-ray tanks, and laboratory sinks. Refer to the product specification sheet and installation instructions for approvals, dimensions, and service procedures.