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Re: a/c condensate terminating at sink drain
It's been my experience that there should be a 4" air gap between the sewer drain and the condensate drain. That prevents bacteria from working it's way up the line and into the air handler. When I see these I call them (if I'm sure it's the condensate drain).
I've had sellers, agents and even some old time HVAC techs (that's the way we have always done it) go off on me about it but that's the price of fame.
Bruce
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