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Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.
A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices, [1] [2] reduced pressure zone assemblies (RPZA), [3] or reduced pressure principle ...
A backwater valve is a backflow prevention device used to prevent outbound water through a dwelling's drain pipes from re-entering -- "back flowing"—into a home. The valve contains a flap that allows water to exit the home, but closes to prevent the back flow into the home.
Plumbing equipment includes devices often behind walls or in utility spaces which are not seen by the general public. It includes water meters , pumps , expansion tanks, back flow preventers , water filters , UV sterilization lights, water softeners , water heaters , heat exchangers , gauges, and control systems.
The devices allow air into the system to prevent a siphon at the point of use. Hose connection vacuum breakers are installed on faucets and hose bibbs to prevent backflow into the water supply. Pressure type vacuum breakers are similar to atmospheric vacuum breakers but have a spring-loaded check valve to allow operation of under pressure for ...
January 30 – Natural gas leaking from a pipeline under repair in Colorado Springs, Colorado, ignited, sending flames 45 feet into the air, and injuring four people. [ 166 ] March 12 – A petroleum pipeline ruptured and burned near Corsicana, Texas , forcing the closure of an Interstate highway, and causing some evacuations.
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