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Captflx 08-14-2008 06:14 PM

Condensor drain
The condensor has a 5 ft. long 1" drain to a vertical 2" I.D. drain in a wall. The condensor drain makes a 90 degree turn to enter the wall drain. I have a pan and second drain to my soffit.

I plan to seal the condensor drain in the wall drain so the next overflow backs up into the condensor and then flows into the drain pan.

When I seal the condensor drain into the wall drain, do I need to put a vent stub at that point? The drain trap is in the wall about 30 inches below the condensor drain entrance.

8 Ball 08-14-2008 06:23 PM

The secondary drain is in the soffet so that you can see there is a problem, if the primary drain backs up.

Sounds like the 2in drain is getting plugged up and overflowing. Is the 2in pipe trapped? If it is, sure seal it up and extend a vent higher than the pan, from the top of the 2in opening.

Just remember that the trap will dry out during heating season, and allow sewer gas to be drawn into the airhandler. There are automatic fills for traps, look into them before you commit to sealing it up.

Might just be easier to run a new 1in drain to a more logical location, and seal up the 2in drain.

Captflx 08-14-2008 06:32 PM

The 2" drain starts about 4" above the ceiling, travels down the wall into the slab. About 30" below the ceiling is where the drain trap is located.

Captflx 08-14-2008 06:35 PM

Because the condensor drain is not sealed when it enters the wall drain, the back up never takes place in the pan. It overflows out of the 2" wall drain onto my ceiling.

8 Ball 08-14-2008 06:44 PM

Oh I understand what you mean. Some things just defy logic. Makes you wonder what the h**l were they thinking. Evaporator condensate doesnt have the velocity to clean the trap, so it just goobers up.

I would look for a new route for the 1in evaporator drain. Maybe to a laundry/utility sink.

1610 CUB 08-14-2008 06:56 PM

For a $ or two you can get one of these

Captflx 08-17-2008 10:19 AM

Thanks for the suggestions.

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