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Pappy 1228
Basement toilet runs when 2nd floor toilet flushed
Pappy 1228

Our basement toilet runs for 8 - 10 seconds when the second floor toilet is flushed for the first time. Occasionally the basement toilet runs at other times as well. House was totally replumbed in 2000. Basement toilet is new, installed in January 2014 by licensed plumber. Plumber is cannot determine why. Problem started about a year ago.

dj1
Re: Basement toilet runs when 2nd floor toilet flushed
dj1

When you say it "runs", do you mean:

a. It flushes.
b. It fills up the tank.
c. It leaks into the bowl.
d. all of the above.

HoustonRemodeler
Re: Basement toilet runs when 2nd floor toilet flushed
HoustonRemodeler

E- it gurgles ?

Pappy 1228
Re: Basement toilet runs when 2nd floor toilet flushed
Pappy 1228

When I say "runs" I mean the water runs from the fill pipe into the tank. It seems as though there was a "mini-flush".

dj1
Re: Basement toilet runs when 2nd floor toilet flushed
dj1
Pappy 1228 wrote:

When I say "runs" I mean the water runs from the fill pipe into the tank. It seems as though there was a "mini-flush".

Sounds like you have a "tank-to-bowl" leak. Depending on your model, you can replace the flapper and/or the flush valve (or at least the flush gasket). You will need to remove the tank to replace the flush valve.

Mastercarpentry
Re: Basement toilet runs when 2nd floor toilet flushed
Mastercarpentry

If the toilet also dates back to 2000 then I'd just go ahead and rebuild it. You can leave the lower bowl in place if it's not leaking and rebuild the tank. Kits are made that will have everything you need and going at it this way fixes any potential and real problems short of a cracked casting. I generally do a rebuild like this any time after the flush valve has been replaced due to wear once and that or another problem arises. First you've got the sure-fire fix I mentioned already; second, it's a heck of a lot easier to work on a loose tank that one bolted to the bowl; third it allows you to inspect everything much more easily, and lastly it's not expensive.

If you still have issues then the vent stack may be partially clogged, so when there is heavy drainage some water is drawn from the bowl due to the increased vacuum in the line which the toilet then properly refills as it should. Check for that by flushing the lower toilet and letting it refill, then having a helper flush the upper one as you watch the water in the bowl of the lower one. You may see some minor disturbance of the water in the lower toilet bowl unsder normal conditions, but if it moves a lot or drops significantly suspect the venting.

Phil

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