Why Is The Toilet Humming And Vibrating Well Randomly - Even Well After Flushing The Toilet?


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Anonymous answered
 Usually the diaphragm on the top of the flushing valve needs to be replaced . The reason being the rubber diaphragm worn out as times go by.It is not holding properly , that's why it hums and vibrate.
You have to loosen the four screws that were holding the cover down on top of the flush valve.
This replacement rubber cost only a few dollars,when compare to replace the whole flush-valve.

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