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Old 09-13-2008, 11:41 AM   #1
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toilet leaking, maybe?


We are hearing water running in the pipe to the septic tank just below the toilet in our powder room. This is what we have tried so far:
We turned off the water to the toilet at the shut off valve, flushed the toilet until the tank was empty, but water remained in the bowl.
We watched it for a day or so.
The water eventually stopped running in the pipe to the septic and the water remained in the toilet bowl.
We turned the shut off valve back on and heard no water running for a couple days, but today we can hear it again.
Any ideas?

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Old 09-13-2008, 11:55 AM   #2
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toilet leaking, maybe?


My first guess would be a leaking flapper. Put some food coloring or a couple cups of black coffee into the tank and then watch the water in the bowl for an hour or so. If the water changes color, the flapper is leaking. May need replaced or the sealing surfaces wiped off, since mineral deposits can build up there and reduce the sealing properties. Make sure the water level in the toilet tank is about 1/2" below the overflow tube. This tube will allow water to go straight to the bowl and then, when the toilet trap is full, the water seeps into the drain pipe.

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Old 09-13-2008, 12:43 PM   #3
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toilet leaking, maybe?


Any other ideas? The water in the tank is colored, but not one drop has entered the bowl, so the flapper is not the problem. Thanks!
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Old 09-13-2008, 01:11 PM   #4
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toilet leaking, maybe?


Hmmm. You said the water stayed in the bowl after shutting off the water and flushing the toilet. Makes me wonder if there is a crack up high in the toilet trap that only allows a certain amount of water to leak out. If you can (maybe overnight) go through this process again but make a mark inside the bowl at the water level as soon as you shut it down. Then check to see if the water level in the bowl has gone down any amount.
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Old 09-13-2008, 01:46 PM   #5
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toilet leaking, maybe?


Will try! Thanks, I'll let you know tomorrow how it goes!
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Old 09-14-2008, 06:33 AM   #6
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toilet leaking, maybe?


Did what was suggested. Left overnight. The bowl water dropped less than 3/8 inch. It dropped that small amount in a couple of hours and then nothing more over night. The dripping sound in the septic pipe continued late into the evening, but was stopped this morning.
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Old 09-14-2008, 06:35 AM   #7
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toilet leaking, maybe?


Wanted to clarify above note---after marking the water level in the bowl we turned the water off, flushed the toilet so that the tank was emptied.
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Old 09-14-2008, 11:08 AM   #8
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toilet leaking, maybe?


Makes me think there is a crack in the toilet trap. Only other thing I can think of would be a clogged vent line. If this were true, when other fixtures were used, it would pull a vacuum on the toilet trap and suck water out. This would/could cause a lingering drip.
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Old 09-14-2008, 12:01 PM   #9
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toilet leaking, maybe?


Thanks, we don't think it is the vent. I guess it means a new toilet. Thanks for all your help!
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Old 09-14-2008, 12:31 PM   #10
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toilet leaking, maybe?


We turned the water back on and just like last time, we are hearing no leak. Last time it took a day or so before we heard the water in the septic pipe again---if it is a crack in the trap, wouldn't that start the leak right away after each flush? Any one out there with any other ideas?

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