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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

    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 ...

  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. Roto-Rooter - Wikipedia

    en.wikipedia.org/wiki/Roto-Rooter

    Sam Blanc with an early Roto-Rooter sewer cleaning machine. In the late 1920s, Samuel Oscar Blanc (1883–1964) was cleaning a blocked sewer at his son's (Milton L. Blanc) Des Moines, Iowa, apartment to seek a better solution than digging up the sewer line to remove tree roots that had invaded the underground sewer pipe.

  6. Pressure vacuum breaker - Wikipedia

    en.wikipedia.org/wiki/Pressure_vacuum_breaker

    A pressure vacuum breaker (PVB) is a type of backflow prevention device, used to keep non-potable (or contaminated) water from entering the water supply. A PVB is similar to an atmospheric vacuum breaker (AVB), except that the PVB contains a spring-loaded poppet. This makes it acceptable for applications that are high hazard or where valves are ...

  7. Refinance rates for Thursday, December 19, 2024 - AOL

    www.aol.com/finance/mortgage-and-refinance-rates...

    Mortgage and refinance rates for Dec. 19, 2024: Average 30-year, 15-year rates move higher after Fed's quarter-point cut

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