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What is that hiss coming from my toilet long after it has flushed?

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Wiki User
September 17, 2007 11:44AM

you probably have a seal in your flush valve assembly that is

shot and not closing off the water when the toilet fills back up.

Or you have something like the chain if an older assembly sitting

under the flapper keeping it from closing all the way. If you're a

DYI person it would be best just to replace the assembly, it's

pretty easy to do ... plus if it is the assembly, replacing it will

save you on your water bill too ...

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