For Continuous Pressure Application的意思|示意

对于持续压力应用 This device is not to be used under continuous pressure. For continuous pressure application, specify Watts No. 800 Series pressure type vacuum breakers. Vacuum breakers are not designed, tested or approved to protect against backpressure backflow. For protection against backpressure backflow, install Watts No. 909 Series reduced pressure principle backflow preventers.