Quote:
Originally Posted by Keefelane66
It's similar to a p-trap made out of 3 elbows and and 3 pieces of plastic tubing
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Note that the plumbing code requires all drain lines that are connected to the sanitary sewer system to have a P-trap installed on them. This is primarily to prevent sewer gas from entering your house, and it does provide some protection against insects and small animals. But the condensate drain line from your HVAC unit is not required to have a P-trap. Personally, I would not want a P-trap on my condensate drain because I think it would be more likely to cause a clog than to prevent one. Most clogged drain issues in a house are caused by a stopped-up P-trap.