1 Inch PVB Assembly 1-720AU Zurn 1" 720A Assembly 1-720A Pressure Vacuum Breaker 1 pressure vacuum breaker assembly with union ball valves 1-710 - Zurn 1-710 - 1" Wilkins 710 Pressure Vacuum Breaker Assembly Top of the line backsiphonage protection About This Product 1 in. 720AU pressure vacuum breaker assembly with union ball valves protects against back siphonage in high health hazard, non-potable residential and commercial irrigation applications. The 720A includes an approved check valve, vacuum relief, 2-test cocks, and inlet and outlet full port resilient seated shut-off valves The Zurn Wilkins 720A Pressure Vacuum Breaker Assembly is used in high hazard applications for protection. Zurn Wilkins Model 720A FNPT Cast Bronze 1 In. 300 Psi BFP Vacuum Breaker W720ag Hydrostatic test pressure 300 PSI