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Re: AC condensate drain arrangement
Matthew,
What's that big thing on the end, a humidifier?
Your photo shows only a primary condensate drain, no secondary condensate drain (you can see the blue plug in the secondary opening next to the primary condensate drain line).
Both the primary and secondary condensate lines require traps. There is no trap on the primary condensate line, and, there is no secondary condensate line at all.
The secondary condensate line should be from that blue plug opening to a trap to the auxiliary drain pan. The auxiliary drain pan drain line does not need a trap (and none is installed, that's good).
Now, back to that big thing on the end ... what is it and, no, it should not be tied in with the primary condensate drain line. As connected now, when the primary condensate drain line backs up, that 'big thing on the end' will also back up.
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