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2. Trap (plumbing) - Wikipedia

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

   In the United States, traps are commonly referred to as P-traps. It is the addition of a 90 degree fitting on the outlet side of a U-bend, thereby creating a P-like shape (oriented horizontally). It is also referred to as a sink trap because it is installed under most sinks. Because of its shape, the trap retains some water after the fixture's use.

3. Plumbing fixture - Wikipedia

   en.wikipedia.org/wiki/Plumbing_fixture

   In some occasional cases, a sink may have both a potable (drinkable) and a non-potable water supply. Lavatories and water closets normally connect to the water supply by means of a supply , which is a tube, usually of nominal 3/8 in ( United States ) or 10 or 12 mm diameter ( Europe and Middle East ), which connects the water supply to the ...

4. Drain-waste-vent system - Wikipedia

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

   Generally, a toilet outlet has the shortest trap seal, making it most vulnerable to being emptied by induced siphonage. An additional risk of pressurizing a system ahead of a waste stream is the potential for it to overwhelm a downstream trap and force tainted water into its fixture. Serious hygiene and health consequences can result.

5. Air gap (plumbing) - Wikipedia

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

   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 gap, and the "bottom" of the air gap is plumbed into the sink drain below the basket, or into a garbage disposal unit. When installed and maintained ...

6. Plumbing - Wikipedia

   en.wikipedia.org/wiki/Plumbing

   Plastic hot and cold supply piping for a sink Plastic pipe is in wide use for domestic water supply and drain-waste-vent (DWV) pipe. Principal types include: Polyvinyl chloride (PVC) was produced experimentally in the 19th century but did not become practical to manufacture until 1926, when Waldo Semon of BF Goodrich Co. developed a method to ...

7. Sink strainer - Wikipedia

   en.wikipedia.org/wiki/Sink_strainer

   In houses, sink strainers are often used as drain covers in sinks, showers and bathtubs. Water lines or kitchen systems can get gravel, deposits that break free, and other stray items in the line. Due to the velocity of the water pushing them, they can severely damage or clog devices installed in the flow stream of the water line, for example p ...