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A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [ 1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.
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 ...
Alternatively, a specialized backflow preventer valve may be installed at strategic locations in the plumbing system wherever there is a risk of contaminated fluids entering the water supply pipes. These valves are used where there is not sufficient vertical clearance or physical space to install an air gap, or when pressurized operation or ...
An Atmospheric Vacuum Breaker ( AVB) is a backflow prevention device used in plumbing to prevent backflow of non-potable liquids into the drinking water system. Diagram of Atmospheric Vacuum Breaker in both working states. It is usually constructed of brass and resembles a 90-degree elbow with a hood on its top to allow air to enter the water ...
Photographer Gez Robinson decided to bring the idea to life, and his village is something straight out of a Disney movie! Gez posted a video to Instagram at the end of July showing a log house he ...
Vice President Kamala Harris on Friday is expected to call for a federal ban on price gouging to lower grocery prices and everyday costs for Americans in her first economic policy speech in ...
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