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  2. Sump pump - Wikipedia

    en.wikipedia.org/wiki/Sump_pump

    Alternative sump pump systems can be driven by municipal water pressure. Water-powered ejector pumps have a separate pump, float and check valve. [4] The float controlling a backup pump is mounted in the sump pit above the normal high water mark. Under normal conditions, the main electric powered sump pump will handle all the pumping duties.

  3. Check valve - Wikipedia

    en.wikipedia.org/wiki/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. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...

  4. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    Because certain combinations of check valve failure and/or system backpressure cause the relief valve to discharge, the device must be mounted in a location where the drain will not become flooded. An example of where backflow would harm the water supply is the use of well washing devices inside underground sewerage pumping stations.

  5. Condensate pump - Wikipedia

    en.wikipedia.org/wiki/Condensate_pump

    Note also the 30' discharge valve and actuator to the left of the pump. - Lakeview Pumping Station, Clarendon and Montrose Avenues, Chicago, Cook County, IL} A condensate pump is a specific type of pump used to pump the condensate produced in an HVAC (heating or cooling), refrigeration, condensing boiler furnace, or steam system. [1]

  6. Water hammer - Wikipedia

    en.wikipedia.org/wiki/Water_hammer

    A check valve which closes quickly (i.e., "check valve slam") due to the flow in a pipe reversing direction on loss of motive power, such as a pump stopping. "Non-slam" check valves can be used to reduce the pressure surge. Filling an empty pipe that has a restriction such as a partially open valve or an orifice that allows air to pass easily ...

  7. Centrifugal pump - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_pump

    In addition, a suction-side swing check valve or a vent valve must be fitted to prevent any siphon action and ensure that the fluid remains in the casing when the pump has been stopped. In self-priming centrifugal pumps with a separation chamber the fluid pumped and the entrained air bubbles are pumped into the separation chamber by the ...