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sillyboy22 10-18-2009 04:09 PM

Trap for furnace condensation?
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Hi. I'm remodeling my basement bathroom and in the process found out that the condensation from my furnace drains into the same line as my bathroom sink. I had a plumber come out for an unrelated matter and while he was there he took a look and said I needed a trap there or else methane gas would get in. Could someone tell me where the trap should go? I'm familiar with traps at sinks and such, but not a trap in the middle of the line. I've attached a picture. Can someone help? Thanks so much!


rselectric1 10-18-2009 04:13 PM

I'm not a plumber, rather a remodeler.
However common sense tells me that your plumber is right on the money.

Does it smell funny there?

sillyboy22 10-18-2009 04:17 PM

No, it doesn't smell funny, but I do think he's probably right. I just don't know where to put the trap. Anyone? Thanks!


rselectric1 10-18-2009 04:33 PM

While you are waiting for the plumbers to get to this question, I can make an educated guess that they will probably advise closing up that wye and finding another method for the condensation water.

They make condensate pumps that take water collected from the A-coil area then pump the water to a sump pump or some other acceptable place.

Either that or a stand pipe system to avoid big problems in the event your building drain clogs.

Was that picture you posted behind drywall or was it exposed already?

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