I am remodeling a bathroom and replaced the vanity and sinks. Evidently a 3/4" schedule 40 condensate line was hooked into the drain/trap under the sink. When I tore it out I did not take note of how it was hooked in.

Any suggestions on how to connect the 3/4" 40 into the tubular 1 1/2" drain/trap. I guess it doesn't matter if it is above the trap or below it. It just needs to be hooked in to drain water from the a/c in the attic.

I'm pretty sure hooking it anywhere in the line be fine. the AC drain tube will also act as a vent tube; and the water from the sink will probably even drain better.

You need a wye tailpiece and the condensate line needs to connect on the sink side of the trap.

steve is 100% correct.
tie it in above the trap with a dishwasher tailpiece.
use one of those dishwasher rubber connectors to joint the two.

do NOT tie in after the sink trap

if you do so, your 'air handler' will be cross connected with your sanitary drainage

this is a FACT - PERIOD

I will wager $100,000.00 versus a cup of coffee on this point


you may tie in 'tubular' above the trap

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

quote; I will wager $100,000.00 versus a cup of coffee on this point

Arr you a "piker" or just unsure of your facts? I would wager $1,000,000 against a cup of coffee. Hook it up after the trap and be prepared to deal with sewer gas odors all around the house, particularly in areas where the air does not circulate good.

hj;

re-read my post CAREFULLY

since water runs downhill - after the trap would be on the sewer side

I said do NOT .......... else you would be x-connecting to sewer

you now owe me 1 (one) coffee - half 'n half please

DOH

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

WHY would I do that, since I am on your side and just raised the ante?

seen a/c tie ins where they just put a loop in the condensate line then connect...its not to code here.. how about in your areas?

Usually they connect to a lavatory drain with a branch tailpiece. The ones that connect directly are the ones who call about sewer gas leaks. A "loop" is ineffective because in the winter, the AC is not dehumidifying, so the "trap" will dry out. It is only done by AC guys who do not know better or are tying to cut corners.

Sound advice all around
Just remember
AHUs both supply air and return/exhaust it

Don't want to be drawing air from the sanitary sewer into the supply air

gl

hj,

missed the million $

then

misinterpreted

so

getting old



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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638