06-22-2009, 03:13 AM
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Deity
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Join Date: Apr 2004
Location: Youngstown, Ohio USA.
Posts: 2,258
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Thanked 14 Times in 14 Posts
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AC condensate drains are required to be discharged outside the structure or into an approved "Indirect Waste Receptor". They may not be connected directly to the house DWV system.
To create an Indirect waste receptor the lowest portion of the condensate drain line must remain 2x the pipe diameter or 2", whichever is greater, above the flood level rim of the receptor.
The intent is to prevent bacteria from the DWV system from getting into the condensate line and eventually into the AC evaporator where it could become airborne throughout the structure.
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