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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. Double check valve - Wikipedia

   en.wikipedia.org/wiki/Double_check_valve

   Double check valve. 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 ...

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. Hydraulic ram - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_ram

   A hydraulic ram pump, ram pump, or hydram is a cyclic water pump powered by hydropower. It takes in water at one "hydraulic head" (pressure) and flow rate, and outputs water at a higher hydraulic head and lower flow rate. The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to ...