I’m trying to locate the sewer cleanout. I found a box that looks like it contains it but there are 3 separate plugs. Which one should I use?
I also found this which I’m guessing is something else
Best Answer
You are going to have to do some experimenting. Remove the plugs and start running some water, flushing toilets, etc., and observe which way the water's running. If this is multi-family, there could be separate drains for each unit. If you have a building plan it might show up on it. There's not much else we can do from here.
The premise here is that a flexible liner is inserted into the pipe (usually using air - think of it as turning a sock inside out) and then the liner is hardened in place (water activated? resin?). The new liner will bridge any cracks or breaks in the pipe as well as any gaps in the joints.
I would also suggest actually getting the section of drain in question inspected...you will really want to know what the true problem is before deciding on the proper corrective action.
Here's my speculation, based on your description and my experience. It is just a theory. Do not commit any resources based on this without collecting corroborating physical evidence supporting it. A direction to investigate at least.
The main floor plumbing goes out to a septic tank. The pipes were not placed lower because there was no need, it just meant digging deeper outside. No one wants to do that without good reason.
When the city sewer was installed, the basement construction tied into it, but the old plumbing was never redirected, it remained on the septic tank. Not the best scheme and possibly illegal, but I'm not surprised someone did this.
It is highly probable there is nothing below to the basement to tie into. The sewer may not be much lower than the basement drainage exit. Anything placed lower than this will likely need to drain into an ejector pumping chamber.
Best Answer
You are going to have to do some experimenting. Remove the plugs and start running some water, flushing toilets, etc., and observe which way the water's running. If this is multi-family, there could be separate drains for each unit. If you have a building plan it might show up on it. There's not much else we can do from here.