As long as the shutoff doesn't hit porcelain, you will be fine.My supply is fine left to right (8 inches), however it is 8 1/4" off the floor and Toto says it should be at 4 1/2". Is that a potential problem?
How do you account for the thread in the other forum? You posted to it. Could it be venting?
Terry, I have 5 Guinevere toilets in my new home. I had a problem where the flapper would not close because the handle, which is normally in the "six O'clock" position would stick in the "3 O'clock" position. This only seemed to happen with the toilets in my 6-year old twins bathrooms. It seems that when they went to flush the toilets they would pull the flush handle not too hard or too soft but just enough to get cause the copper rod to "wedge" against the nut holding the handle to the tank. It took me many tries before I was able to replicate the problem, because it was intermittent, but when I did, I called Toto and they sent me out new handles for all the toilets. Since the new handles were installed, the problem has gone away. Toto says that they never heard of this problem. Have you?
The handle for the Guinevere
The only other thing I can think of is if your water pressure is too high, the weakest point in the system will leak...it could be that flush valve can't handle that high pressure. Have you ever checked yours? You can buy a gauge at one of the big box or plumbing supply houses for about $10 with a max tattle-tale hand. Attach it and leave it on overnight and check the pressure periodically and then the max. If it exceeds 80psi anytime, you need a PRV and an expansion tank, or if you have them, one or the other is bad.
The china is the same.
They change the fill valve to shut off a bit sooner.
And on some they weight down the flapper to drop quicker.
But, if you overfill the bowl a bit, the extra water finds it's way down the drain.
If the fill valve is making noise while idle, then you may have a leaking flapper.
Fix the flapper, and the noise will go away.
Those fill valves tend to give a little squeak when they shutoff.
Check the flapper for leaks.
This is awkward, but...
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