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  2. Water heat recycling - Wikipedia

    en.wikipedia.org/wiki/Water_heat_recycling

    Installation of a double-walled copper-on-copper heat exchanger in a vertical section of the master drain line in a Canadian home (2007) Water heat recycling (also known as drain water heat recovery, waste water heat recovery, greywater heat recovery, [citation needed] or sometimes shower water heat recovery [citation needed]) is the use of a heat exchanger to recover energy and reuse heat ...

  3. Are the Cracks in Your Walls a Sign of a Serious Problem? - AOL

    www.aol.com/cracks-walls-sign-serious-problem...

    Learn how to spot the difference between harmless and serious cracks in your walls. We asked an expert to explain when and why you should be concerned.

  4. Plumbing - Wikipedia

    en.wikipedia.org/wiki/Plumbing

    PVC/CPVC – rigid plastic pipes similar to PVC drain pipes but with thicker walls to deal with municipal water pressure, introduced around 1970. PVC stands for polyvinyl chloride, and it has become a common replacement for metal piping. PVC should be used only for cold water, or for venting. CPVC can be used for hot and cold potable water supply.

  5. Greywater - Wikipedia

    en.wikipedia.org/wiki/Greywater

    Left: greywater sample from an office building. Right: Same greywater after treatment in membrane bioreactor. Greywater (or grey water, sullage, also spelled gray water in the United States) refers to domestic wastewater generated in households or office buildings from streams without fecal contamination, i.e., all streams except for the wastewater from toilets.

  6. Air gap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Air_gap_(plumbing)

    Water cannot flow from the sink to the tap in normal circumstances, even if the water supply loses pressure. An air gap, as related to the plumbing trade, is the unobstructed vertical space between the water outlet and the flood level of a fixture. [1]

  7. Shower - Wikipedia

    en.wikipedia.org/wiki/Shower

    Navy shower, a method of showering that allows for significant conservation of water and energy. Power shower, a shower stall device that works similarly to a mixer shower by mixing existing hot and cold water feeds, but locally increases the water pressure available to the shower head by means of an electric booster pump.

  8. Trap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(plumbing)

    Maintaining the water seal is critical to trap operation; traps might dry out, and poor venting can suction or blow water out of the traps. This is usually avoided by venting the drain pipes downstream of the trap; by being vented to the atmosphere outside the building, the drain lines never operate at a pressure much higher or lower than ...

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