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What causes a toilet to back-up?

GasX

Lifer
I have one of those ghetto toilets in my basement that is never used. I just went down there to find a thankfully small flood of rather rank water. I traced it to the toilet. Anyone know why this would have happened? This toilet is never used and flushes fine so it is not from "use" or anything we put down it.

I am not looking forward to cleaning this up... :|
 
It was a transient event. Everything is fine now and the toilet flushes fine... I called the water department, but it is Saturday and I have to wait for the guy to call me back...
 
Was it installed correctly? The pipe need a certain angle and also need to be connected to a pipe that has a gas vent or the pressure will back up and get what has happened.

Is this new or has it been like this for a while?
 
This is very old equipment and I have lived here over a year. It's the first time anything like this has happened.

I just heard from the municipal sewer guy and he is on his way to see what is up...
 
probably a blockage in the sewer main. Could be roots, or partially collapsed. If it happens again, I reommend you get the line cammed to see what the problem is. You should also dump a bottle of root killer in the toilet just to be safe
 
If I'm not mistaken, isn't there a pump on the toilet in the basement? And, within it, somewhere, (or on the line right by it), there should be a check valve which prevents anything from backing up, even if it wanted to. You may have to replace the check valve.
 
Originally posted by: DrPizza
If I'm not mistaken, isn't there a pump on the toilet in the basement? And, within it, somewhere, (or on the line right by it), there should be a check valve which prevents anything from backing up, even if it wanted to. You may have to replace the check valve.

Not when it's an 85 year old house. It seems I had roots growing into the line ~75 feet from the house. It's all clear now and I am $400 poorer.
 
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