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2. Air gap (plumbing) - Wikipedia

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

   A common use of the term "air gap" in domestic plumbing refers to a specialized fixture that provides backflow prevention for an installed dishwasher. This "air gap" is visible above the sink as a small cylindrical fixture mounted near the faucet. In the base cabinet under the sink, the drain hose from the dishwasher feeds the "top" of the air ...

3. Faucet aerator - Wikipedia

   en.wikipedia.org/wiki/Faucet_aerator

   Faucet aerator. An aerator attached to a sink tap. A faucet aerator (or tap aerator) is often found at the tip of modern indoor water faucets. Aerators can simply be screwed onto the faucet head, creating a non-splashing stream and often delivering a mixture of water and air.

4. Low-flow fixtures - Wikipedia

   en.wikipedia.org/wiki/Low-flow_fixtures

   A low-flow fixture is a water saving plumbing fixture designed to achieve water savings by having a lower flow rate of water or a smaller quantity per flush. Some of these low-flow fixtures are faucets, showerheads, and toilets. In the United States a maximum water usage of conventional plumbing fixtures was federally mandated by the Energy ...

5. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Copper fittings for soldered joints. Pipe fittings: 1) Copper (solder); 2) Iron or brass (threaded); 3) Brass (compression); 4) Brass (compression to solder); 5) Brass adapters. PVC fittings. A fitting or adapter is used in pipe systems to connect sections of pipe (designated by nominal size, with greater tolerances of variance) or tube ...

6. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   Gas water heaters have an exhaust vent or one to two exhaust pipes on the top, and still require electric power for electronics, sensing and ignition. A three-phase, 21 kW, 400-volt tankless water heater in Europe, with new European color coding for three-phase power. There are also heaters that use several single-phase circuits instead.

7. Tap (valve) - Wikipedia

   en.wikipedia.org/wiki/Tap_(valve)

   Tap tails are normally 1 ⁄ 2 " or 12 mm in diameter for sinks and 3 ⁄ 4 " or 19 mm for baths, although continental Europe sometimes uses a 3 ⁄ 8 " (still imperial) size. The same connection method is used for a ballcock. The term tap is widely used to describe the valve used to dispense draft beer from a keg, whether gravity feed or ...