Vent needed on condensate drain?

Discussion in 'HVAC Heating & Cooling' started by TJanak, Mar 24, 2010.

  1. TJanak

    TJanak Member

    Sep 9, 2009
    South TX
    Had a new air handler put in the attic and I need to hook up the condensate drain. It is 3/4 PVC and has a P trap and tee's into the bathroom sink vent in the attic. The old PVC drain had a vent immediately behind the P trap which consisted of a T with a 6" piece of PVC glued in it. The vent was taped closed when I bought the house.

    Is the vent needed? It's about an 8' run from the air handler to the sink vent with one 90* bend in the line and the P trap about 18" from the air handler. The way it was setup we never had a problem with sewer smell in the house or attic.

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