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  2. Instant hot water dispenser - Wikipedia

    en.wikipedia.org/wiki/Instant_hot_water_dispenser

    A hot water dispenser which keeps water hot in a tank uses the energy needed to heat the water to the required temperature and wastes the energy needed to keep the water hot permanently in a thermally-insulated tank when not being used. These tank type dispensers often also consists of energy wasting 'keep warm' and 'reboil' functions. On the ...

  3. Washing (photography) - Wikipedia

    en.wikipedia.org/wiki/Washing_(photography)

    A quick, water-saving, and archival technique for washing film fixed with nonhardening fixer in a spiral tank is the popular "Ilford method": [2] Fill the developing tank with tap water at the same temperature as the fixer (+/-5 °C or 9°F)—maintaining a constant bath temperature during processing is necessary to avoid reticulation of the ...

  4. Hydrostatic test - Wikipedia

    en.wikipedia.org/wiki/Hydrostatic_test

    This type of test is suitable for containers such as boat fuel tanks, which are not pressure vessels but must work under the hydrostatic pressure of the contents. A hydrostatic test head is usually specified as a height above the tank top. The tank is pressurised by filling water to the specified height through a temporary standpipe if necessary.

  5. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Water typically enters residences in the US at about 10 °C (50 °F), depending on latitude and season. Hot water temperatures of 50 °C (122 °F) are usual for dish-washing, laundry and showering, which requires that the heater raise the water temperature about 40 °C (72 °F) if the hot water is mixed with cold water at the point of use.

  6. Water dispenser - Wikipedia

    en.wikipedia.org/wiki/Water_dispenser

    This brings the temperature of the CO 2 gas down to the temperature of the cooling tank. As carbonated water is dispensed, the mixer tank is automatically refilled with cold water and carbon dioxide, ensuring a continuous supply of carbonated water is readily available.

  7. Air lock - Wikipedia

    en.wikipedia.org/wiki/Air_lock

    If the water flow velocity is below the rising velocity of air bubbles, then water trickles down to the low point Lo2 and traps the remaining air between Hi1 and Lo2. As more water flows down, the upward leg Lo2 to Hi2 fills up. This exerts a pressure on the trapped air of either H2 m of water (WG = water gauge) or H1, whichever is less.

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