[TomPerry]

Originally Posted by Altavia

I think the risk is damage if vinegar/bleach gets into metal parts of the HVAC drain pan.

What metal parts? The drain pipe is all PVC all the way to ground outside.

[retiredguy123]

Originally Posted by TomPerry

What metal parts? The drain pipe is all PVC all the way to ground outside.

Fumes that can back up into the AC unit.

[jimkerr]

Vinegar and caustic chemicals like bleach are a no no. Just flush with water and also suck it out with a wet vac. That’s all you need to do.