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2. Vacuum sewer - Wikipedia

   en.wikipedia.org/wiki/Vacuum_sewer

   Trains, aircraft, buses, and many ships with plumbing generally have vacuum systems with vacuum toilets. The lower water usage (less than a quarter of a liter per flush) [4] saves weight, and avoids water slopping out of the toilet bowl in motion. [9] Aircraft toilets may flush with blue disinfectant solution rather than water. [4]

3. Water well pump - Wikipedia

   en.wikipedia.org/wiki/Water_well_pump

   Deep well pumps extract groundwater from subterranean aquifers, offering a reliable source of water independent of municipal networks. These pumps, often submersible and powered by electricity, can access water reserves located much deeper than shallow wells, ensuring a consistent supply even during periods of drought.

4. Flushometer - Wikipedia

   en.wikipedia.org/wiki/Flushometer

   A narrow passageway leads from the main water supply into the pressure chamber. It is the narrowness of this passage that meters the flow by slowing repressurizing of the pressure chamber after the action of a flush. The diaphragm technology allows the flush valve to open and let water into the bowl. A main cylinder valve operates up and down.

5. Sanitary manhole - Wikipedia

   en.wikipedia.org/wiki/Sanitary_manhole

   This can be accomplished by having a flushing manhole at the head sewer. Flushing manholes are used to store water that can be released to flush solids in the sewers. A simple design is a manhole that allows a sanitary worker to open and close a value from the ground level to perform water filling and flushing operations.

6. Well - Wikipedia

   en.wikipedia.org/wiki/Well

   Man cleaning a well in Yaoundé, Cameroon Hand pump to pump water from a well in a village near Chennai in India, where the well water might be polluted by nearby pit latrines. Shallow pumping wells can often supply drinking water at a very low cost. However, impurities from the surface easily reach shallow sources, which leads to a greater ...

7. Hand pump - Wikipedia

   en.wikipedia.org/wiki/Hand_pump

   The complexity of the pumps is a fundamental problem for all programs of this kind, as well as the quality of the pumps given the heavy demands of a village. [20] A 1994 study, also Bank funded, of the endurance of hand pumps in Africa showed that only 41 to 51 percent of hand pumps were still functioning. [ 20 ]