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05-17-2007, 05:57 PM
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Member
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Join Date: Mar 2007
Location: Alvin Texas
Posts: 367
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AC Primary drain vent
I have seen several of these lately with tape over the open end. Sorry I dont have a picture, but try to envision the small vertical vent pipe (~ 6" in length) next to the evaporator coil. I skimmed the IRC, but didnt see anything about it.
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05-17-2007, 06:57 PM
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Member
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 7,643
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Re: AC Primary drain vent
Vent should be on opposite side of trap from AHU.
If not, it only serves as a clean out, and allows air to be sucked in or blown out, wasting energy (and, if sucking in, sucks in unfiltered air).
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05-18-2007, 07:09 AM
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Join Date: Mar 2007
Location: Alvin Texas
Posts: 367
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Re: AC Primary drain vent
Yes, the vent is downstream of the trap. Im starting to question my understanding of this. I thought the vent was supposed to be open and not taped over or capped. I havent missed some new rule or change in physics have I?
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05-18-2007, 07:13 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 7,643
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Re: AC Primary drain vent
Originally Posted by imported_John Smith
Yes, the vent is downstream of the trap. Im starting to question my understanding of this. I thought the vent was supposed to be open and not taped over or capped. I havent missed some new rule or change in physics have I?
If it is downstream of the trap, it could be a vent, and would be open.
If it is upstream of the trap, it could be a cleanout access, and would be capped. |
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05-17-2007 08:00 PM |
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