3 Ways to Vent Plumbing - wikiHow
2021-5-4 · Drain pipes carry water from sinks, showers, tubs, and other appliances. They often are equipped with a P-trap, or a bend in the pipe just below the sink or other fixture, in the shape of a P. This traps water in the bottom of the P, blocking the pipe and preventing gases and odors from escaping into your house through the drain pipe.
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