Drain plumbing for outdoor kitchen sink

Old 06-02-06, 11:59 AM
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Drain plumbing for outdoor kitchen sink

I am building an outdoor kitchen, and want to run gas, hot/cold, and a drain back from the sink.
I understand the gas and hot/cold supply.

What do I need to do to prevent freezing in the P-Trap under the sink? is it OK for the P-Trap to freeze? If I drain it, the trap will be rendered inoperative and gases may escape, as well as cold air will reach my indoor stack? WHat is best practice?

Thanks from a newbie.
Old 06-02-06, 12:13 PM
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Outdoor kitchen? your kidding right?
Old 06-02-06, 01:18 PM
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Even if it freezes it probably won't crack the plumbing. At least mine doesn't, but I live in the south. The expansion should basically 'spill over' into the pipe.

I would probably be sure and use a screw apart plastic p-trap so that is easily replaceable. If it breaks simply replace it. And if you are going to leave it for an extended time you can simply unscrew it, empty it, and plug the drain.
Old 06-02-06, 02:01 PM
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Why not use a Recreational Vehicle anti-freeze? Fill the trap at the end of summer or when the temps start dropping. I assume you are using an Air Admittance Valve for a vent. Good luck with your project.

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