Trap Help

Old 07-10-01, 07:43 PM
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I have a new sink I'm installing in my bathroom. It's a pedistal type of sink and I would like to run the pipe from the tailpiece down throught the base and install the trap under the floor. This means it would be about 4 feet from the sink basin. Could this be done, or rather, should it be done? Also, there is no vent pipe in the bathroom for this fixture, as it has had a sink before that didn't have one either (I just bought this house). Any suggestions on what might work?

Old 07-11-01, 12:43 AM
Join Date: Feb 2001
Location: Seattle, WA
Posts: 672
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negative my friend, you need to have no more than a 24" drop from the outet in the bowl of the sink to the water level in the p-trap. You should go into the wall where it will connect with a vent of some kind.
A 360 degree loop in the pipe, commonly called an "S-trap" usually used in those straight drops through the floor are no longer allowed by plumbing code.

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