Is it possible it just connects to the main sewer line under the slab?G26ster wrote:We have an older home (circa 1965) on a concrete slab (not big news for TX). The Heater/AC unit is in a central closet. The PVC condensation pipe goes down the side and into a larger pipe into the slab. That larger pipe must be backing up and leaking as it is a bit wet where it enters the slab, but much wetter about a foot forward outside the closet under the rug. It's happened before, but quite a while ago.
I believe last time the plumber blew the line out from the closet end. However, in viewing videos online, there is supposed to be an outside pipe that you can suction to clear the line. Trouble is there are no pipes out by my compressor or any I have seen in the 15 years I have lived here. Is it possible it just connects to the main sewer line under the slab? I know there are tablets, or bleach you can pour in to help clear the clogging (I put some bleach in tonight) and turned the a/c way up so it would shut off for a while. The missus used to help out in Apt. maintenance when she worked at a complex, and she said they just turned the units off for a bit and put in the tablets.
In any case, I'm open to any and all advice as to the best way to handle this, short of calling a plumber. I had to fix a slab leak this year and it wasn't cheap, so if I can avoid a plumber it would be nice. Thanks.
Present building codes (in most jurisdictions) require the primary condensation drain to be connected to a trapped sanitary drain...I don't know what code allowed when your house was built (1965)
I know there are tablets, or bleach you can pour in to help clear the clogging (I put some bleach in tonight)Be careful with the bleach...you should really use a non-oxidizing biocide. Bleach will rust your evaporator coil frame, and drain pan (if it's metal). If you use bleach, dilute it and minimize contact with metal surfaces.
Good luck!