I'm at my wits end and could use some suggestions on what could be happening at our house....
Overview: One bathroom, located in the newer addition to the house is not draining correctly. All other fixtures and drains in the original part of the house are unaffected.
The problem was first noticed when the shower stall was extremely slow to drain. After testing the other fixtures in the bathroom it was discovered that the bathroom sink was slow to drain and the toilet would not flush. Again, all other fixtures in the original part of the house are unaffected. It is only one bathroom located in the newer addition.
Naturally, we assumed that there was a clog somewhere in the drain after these three fixtures tied into one line, but before that line tied into the original house's main sewer. Thus, we snaked the toilet, the toilet drain with the bowl removed and the shower drain to the full 20' of a hand snake. No obstructions were encountered and only a minimal amount of hair came back on the snake.
Next, we opened the clean-out for that drain and found waste and paper had backed up nearly to the top. This was cleaned out and a high pressure bladder was used to clean and clear any obstruction from the clean-out to the original house's main sewer line.
The shower was checked again and appears to be draining fine now, but the toilet will flush once only if allowed to sit for hours and then will not flush again unless allowed to sit.
I'm at a loss. Is it possible the original problem was indeed a clog and that the toilet was damaged when snaking? Or could it be that there is a venting issue? I would hate to spend the money on a toilet, just to find that I hand't ruled something else out first that is the real culprit.
Any help or suggestions would be greatly appreciated.