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Old 08-14-2008, 06:14 PM   #1
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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.

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Old 08-14-2008, 06:23 PM   #2
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Condensor drain


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.


Last edited by 8 Ball; 08-14-2008 at 06:39 PM.
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Old 08-14-2008, 06:32 PM   #3
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Condensor drain


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.
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Old 08-14-2008, 06:35 PM   #4
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Condensor drain


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.
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Old 08-14-2008, 06:44 PM   #5
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Condensor drain


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.

Last edited by 8 Ball; 08-14-2008 at 07:03 PM.
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Old 08-14-2008, 06:56 PM   #6
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Condensor drain


For a $ or two you can get one of these

http://www.plumbersurplus.com/Prod/L.../64736/Cat/284
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Old 08-17-2008, 10:19 AM   #7
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Condensor drain


Thanks for the suggestions.

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