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2. Circulator pump - Wikipedia

   en.wikipedia.org/wiki/Circulator_pump

   The traditional hot water recirculation system uses the existing cold water line as return line from the point of use located farthest from the hot water tank back to the hot water tank. The first of two system types has a pump mounted at the hot water heater while a "normally open" thermostatic control valve gets installed at the farthest ...

3. Water recycling shower - Wikipedia

   en.wikipedia.org/wiki/Water_recycling_shower

   External hot water is used to maintain temperature, with incoming hot water replacing the used water within the loop. In addition to replacement, water within the loop is filtered and purified with UV light. [11] For users unable or unwilling to use the recycling mode, the e-Shower offers a classic shower where all the water is drained. [12]

4. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   Recirculation systems: Since a tankless water heater is inactive when hot water is not being used, they are incompatible with passive (convection-based) hot water recirculation systems. They may be incompatible with active hot water recirculation systems and certainly use more energy to constantly heat water within the piping, defeating one of ...

5. Heat trap - Wikipedia

   en.wikipedia.org/wiki/Heat_trap

   Heat traps are valves or loops of pipe on the cold water inlet and hot water outlet of water heaters. The heat traps allow cold water to flow into the water heater tank, but prevent unwanted natural convection and heated water to flow out of the tank. [1] [2] Newer water heaters have built-in heat traps.

6. GE BWR - Wikipedia

   en.wikipedia.org/wiki/GE_BWR

   Variable speed pumps were replaced with two-speed pumps (each rated at 35,400 US gallons per minute (2.23 m 3 /s) for a discharge pressure head of 865 feet (264 m)), and a flow control valve (adjustable from 22% open to 100% open with a linear flow response) was added to each loop for use in regulating recirculation flow (capable of regulating ...

7. AOL Mail

   mail.aol.com

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