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  2. Water hammer - Wikipedia

    en.wikipedia.org/wiki/Water_hammer

    In residential plumbing systems, water hammer may occur when a dishwasher, washing machine or toilet suddenly shuts off water flow. The result may be heard as a loud bang, repetitive banging (as the shock wave travels back and forth in the plumbing system), or as some shuddering. Other potential causes of water hammer: A pump stopping

  3. January 2025 Richmond water crisis - Wikipedia

    en.wikipedia.org/wiki/January_2025_Richmond...

    [40] 230,000 people had been reported to have been experiencing very low water pressure before the city was placed on the advisory. [2] Multiple officials inquired to Bingham about rumors circulating on social media about low water pressure. [38] The first water-crisis-related post to WebEOC was made around this time. [13]

  4. Hydraulic ram - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_ram

    The momentum of the water flow in the inlet pipe against the now closed waste valve causes a water hammer that raises the pressure in the pump beyond the pressure caused by the water column pressing down from the outlet. This pressure differential now opens the delivery valve [5], and forces some water to flow into the delivery pipe [3].

  5. 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 ...

  6. Low-flow fixtures - Wikipedia

    en.wikipedia.org/wiki/Low-flow_fixtures

    Low-flow kitchen faucets can cause the filling of a pot to take a long time. In addition, performance issues with low-flow faucets often pertain to their ability to properly rinse or wet. In the United States the EPA's WaterSense has established minimum flow rates for lavatory fixtures to ensure satisfaction with low water pressures. [20]

  7. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    Water pressure may fail or be reduced when a water main bursts, pipes freeze, or there is unexpectedly high demand on the water system (for example, when several fire hydrants are opened). Reduced pressure in the pipe may allow contaminated water from the soil , from storage, or from other sources to be drawn up into the system.

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