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Leak at water supply into tank.

I have a Toto toilet with the GMax flushing system. Recently we noticed the toilet leaking in the back and I have tracked the problem down to one thing I believe. The drip come from between the plastic nut that tightens onto the intake pipe sealing the unit against the tank. I thought the seal was bad and replaced it but still have the drip. I noticed that the drip rate is much higher when the tank has filled (therefore higher pressure inside the intake pipe) and the water supply is left on. When I turn the water supply off the drip slows. Also the water level in the tank itself does not decline. I have removed the flushing unit to inspect it and cannot see any cracks in the pipe. Any suggestions on what part(s) need to be replaced or does the whole flushing mechanism need to be replaced as a whole? Thanks in advance for any help.

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Seams like you have a hair line crack in the intake pipe. I would recomend replaceing it to solve your problem.

Posted on Sep 10, 2009

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