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ptrap

In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass through. In oil refineries, traps are used to prevent hydrocarbons and other dangerous gases and chemical fumes from escaping through drains. In heating systems, the same feature is used to prevent thermo-siphoning which would allow heat to escape to locations where it is not wanted. Similarly, some pressure gauges are connected to systems using U bends to maintain a local gas while the system uses liquid. For decorative effect, they can be disguised as complete loops of pipe, creating more than one U for added efficacy.

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    Belfast sink waste kit only has a single washer

    Hello, I'm installing my first Belfast/butler kitchen sink. It came with the waste and stainless steel drain. To my surprise the kit only has one washer in which the instructions clearly state that it should be placed underneath the sink. My question is, shouldn't there be a washer between the...
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    Sewer smell from shower on hot days

    For about a year, my shower on a third floor is giving an on off gas smell sometimes after a shower and particularly in the morning not long after the sun rises enough to hit our roof. I usually run some water into my p-trap and the smell goes away after a few minutes. There is a tub right...
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