Anybody who's ever owned a boat--especially a sailboat--knows that water can flow up. And over. and around and down and...

As it turned out the drain in the HVAC line was clogged.

Sleuth searched the shower using a camera in the wall and could find no evidence of a leak. Thought it was the toilet and no leak there. Than looked outside and not there.

He listened and listened and said where is hvac. Went out there and found the problem.

Seems like pouring a half gallon of water down drain did not do anything as water drained but under the filter was about 2=3 gallons of water which we got rid of using shop vac.

Do not have snake and hvac has not had a pm for some time so will call in morning.

Thanks for guidance learned a lot today.

Glad you found the issue and that it was a “relatively “ inexpensive fix !

You might have a way to use a garden hose and force water into the drain pipe. This might clean out the line. On my heater you pour vinegar and or water in a top drain. Do not use this. I have a horizontal pipe that goes into the drain line. It has a place next to the heater where I can use a garden hose. Might start at the outside drain pipe with the garden hose and have some watch the heater to tell you when water starts coming out. When I did it I let the water run on high for about 5 seconds. Let drain out and kept repeating. Then did it from the inside to flush the line. A shop vac can also be used at the outside drain or an air pump.

Thanks for the advise but think it is time to let a professional hvac guy get involved. We do need a pm on the system so that would kill two birds with one stone.

Thanks

Funny you said that. I was walking today and noticed how the height of the A/C drains on newer houses vary on how high before the elbow turn down. Some was sticking way up 12 to looked like 14 inches, or more over the slab level? And height varied like there was not standard height?

I thought to myself that may create clogging condition or make it clog faster cause of the amount of water in line and the gravity pressure it takes to flow out onto ground. I measured mine and it sticks up about 9” to point the water flow (drips out).

IMO very puzzling?

IMO full pressure with water hose could cause it back up the drain and could get all way up in the A coil drain pan? My 5 dollar fix fixed that problem to get full 55 psi down the drain and out through the access Y fitting with the cap, I added cut-off valve above the access port clean out.

Agree you have to be careful and only put in a little water at a time. Adding a cut off value and hose bib is the best way to go.

On my system the horizontal drain pipe that gets the winter heating condensation (feeds into the A/C drain pipe) would let the water flow out and onto the floor and avoid the backing up in the A/C unit or heater.

Another update.

We did clean that pipe somewhat and no more leaking into stall shower.

Having Munn's coming Friday for pm (overdue in any case as we have no idea how often previous owner had it serviced and as part of their pm service no charge for eliminating clogs.

Interesting how the leak detection company was hired to find the leak and turned out to be a clog. Money well spent as a plumber might well have taken down a wall looking for source of the leak.

Souds like both the pan & the pile need a cleaning. Munns will do that.