Zurn 34-460XL 3/4 In. FNPT x FNPT Spill Resistant Pressure Vacuum Breaker - 150 PSI - Cast Bronze

Designed for installation on indoor and outdoor point of use applications to protect against backsiphonage of contaminated water into the water supply. during start-up andoperation a separate diaphragm seals the air inlet from the water supply preventing spillage. the assembly is designed for use under constant pressure and provides protectionwhere a potential health hazard exists. standard compliance asse listed 1056 iapmo listed csa certified approved by the foundation for cross connection control and hydraulic research at the university of southern california nsf listed - standard 61, annex g certified to nsf/ansi 372 by iapmo r&t.