Draining attic Furnace condensate into sewer vent staxk - General HVAC Discussion - HVACSite

Draining attic Furnace condensate into sewer vent staxk

 
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Old 02-23-2018, 02:41 PM   #1
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Draining attic Furnace condensate into sewer vent staxk


Is it permissible to drain the condensate line of an attic furnace into a sewer vent stack since the internal trap will remain wet? My concern is that if the trap were to dry out for some reason, sewer gasses can back up into the furnace. Won't it dry out during summer months? Is an air gap needed? Is it not concerned if it's only connected to the exhaust side of things rather than the air supply? Thanks.

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