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  2. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    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.

  3. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    Backflow preventers are categorized into three groupings: Assembly, Device or Method. With the exception of elimination, these are the only ways one can control backflow from taking place. The eight named backflow assemblies all have two resilient seated isolation/shut off valves with properly located test ports.

  4. Backflow - Wikipedia

    en.wikipedia.org/wiki/Backflow

    Backflow is a term in plumbing for an unwanted flow of water in the reverse direction. [1] It can be a serious health risk for the contamination of potable water supplies with foul water . In the most obvious case, a toilet flush cistern and its water supply must be isolated from the toilet bowl.

  5. Lehman's Hardware - Wikipedia

    en.wikipedia.org/wiki/Lehman's_Hardware

    Lehman's is a retail store located in Kidron, Ohio. Originally specializing in products used by the Amish community, it has become known worldwide as a source for non-electric goods. The 35,000-square-foot (3,300 m 2 ) facility bills itself as a "Low Tech Superstore" and a "Purveyor of Historical Technology", both of which are reflected in ...

  6. True Value hardware store files bankruptcy, to be sold to Do ...

    www.aol.com/true-value-hardware-store-files...

    To find one near you, use True Value's store locator. Do it Best, based out of Fort Wayne, Indiana, has 159 locations across the Buckeye State. To find the closest one to you, use its store locator .

  7. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams.The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

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