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  2. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    The key to a functional island fixture vent is that the top elbow must be at least as high as the "flood level" (the peak possible drain water level in the sink), allowing it to serve as a de facto vacuum breaker preventing the loop from becoming a siphon for an overfilled sink, as from a clogged drain (rather than vent) line.

  3. Drainage equation - Wikipedia

    en.wikipedia.org/wiki/Drainage_equation

    the permissible long term average depth of the water table (Dw) on the basis of agricultural drainage criteria; the soil's hydraulic conductivity (Ka and Kb) by measurements; the depth of the bottom of the aquifer (Di) the design drain spacing (L) can be found from the equation in dependence of the drain depth (Dd) and drain radius (r ...

  4. How To Clean Your Kitchen Sink Drain In 3 Easy Steps - AOL

    www.aol.com/clean-kitchen-sink-drain-3-170000018...

    How To Unclog A Kitchen Sink Drain. If a sink drain is clogged and you want to try to clear it before having to call a plumber you can try an enzyme cleaner or boiling water. Both can be helpful ...

  5. Fixture unit - Wikipedia

    en.wikipedia.org/wiki/Fixture_unit

    In plumbing, a Fixture Unit (FU) or Drain Fixture Unit (DFU) is "a unit of measure, based on the rate of discharge, time of operation and frequency of use of a fixture, that expresses the hydraulic load imposed by that fixture on the sanitary plumbing installation". [1] A Fixture Unit is not a flow rate unit but a design factor.

  6. Sources and sinks - Wikipedia

    en.wikipedia.org/wiki/Sources_and_sinks

    From left to right: a field with a source, a field with a sink, a field without either. In the physical sciences, engineering and mathematics, sources and sinks is an analogy used to describe properties of vector fields. It generalizes the idea of fluid sources and sinks (like the faucet and drain of a bathtub) across different scientific ...

  7. Drain (plumbing) - Wikipedia

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

    A drain cover is a cover with holes (e.g. a manhole) or a grating used to cover a drain, to prevent unwanted entry of foreign objects, or injury to people or animals. It allows drainage of liquids but prevents entry from large solid objects, and thus acts as a coarse filter. A sink drain cover is a drain cover used to cover the sink drain.

  8. Percolation test - Wikipedia

    en.wikipedia.org/wiki/Percolation_test

    A percolation test (colloquially called a perc test) is a test to determine the water absorption rate of soil (that is, its capacity for percolation) in preparation for the building of a septic drain field (leach field) or infiltration basin. [1] The results of a percolation test are required to design a septic system properly.

  9. Floor drain - Wikipedia

    en.wikipedia.org/wiki/Floor_drain

    Floor drain system in bathroom, Korea. A floor drain is a plumbing fixture that is installed in the floor of a structure, mainly designed to remove any standing water near it. They are usually round, but can also be square or rectangular. They usually range from 2 to 12 inches (5.1 to 30.5 cm); most are 4 inches (10 cm) in diameter.