AC drain line question.

[critter69]

Now for the correct answer ( not being a Richard )… You have a gas furnace system…
You have a POSITIVE pressure drain system…therefore no trap is necessary. And this is because your evaporator is on the discharge side of the blower.
If your system was electric the drain would be on the suction side of the blower thus creating a NEGATIVE pressure drain system. Then you would need a trap

I don’t know about down there, but here we install all gas furnaces, and code requires we install p traps ( positive pressure).

[Monark]

Sorry for the crude sketch, but if you straighten it all out, it is plumbed like this. I don't think the P trap is serving it's purpose.

I think you are plumbed correctly. Most primary condensate drains are piped to a vent pipe above a toilet or sink/bathtub. Most overflow catch pans are piped through the soffit or wall so that's it's obvious when the primary is clogged.

[Goldeneagle]

This is a single story house. Unit is in a closet not in the attic. There is no secondary drain.

[tdwinklr]

The Bleach issue , As i was told, is that the chemical reaction from the sodium hypochlorite can lead to the overall degradation of the metal coils in the system. the Vinegar is supposedly a
less reactive agent. ( I failed science ) so my AC Tech, said that vinegar is less reactive, and NON Toxic.

He's running PVC on the drain, and likely only poured a very small amount in once or twice a year. I don't see the problem to the system.

[Goldeneagle]

He's running PVC on the drain, and likely only poured a very small amount in once or twice a year. I don't see the problem to the system.

PVC going to copper through the slab.

[jdavidson]

Well, right or wrong, I put it back like the previous unit.

please leave it just like you currently have it…because you have it correct