Most leaks of this nature are caused because the installer tightens the
screws from inside the the tank rather than tightening the nut from
underneath and holding the screw head in place while firmly applying
downward pressure (as one poster already suggested) on the tank.
Turning the screw head from the inside totally distorts the rubber seals.



Joe wrote:
On Fri, 08 Apr 2005 03:19:39 GMT, The Dave? wrote:


I have a new toilet that was put in about three weeks ago. Last night
it started leaking around the base. Not having time to sort it out I
just called a plumber to fix it. Well, that was fixed, but now it's
leaking from one of the mounting bolts between the tank and the bowl.
I tried tightening it and that helped a little. I tried taking the
bolt and rubber washer out and re-seating them, but that made no
change. Is there anything easy that I am forgetting to help this seal,
or is it just a continual hit-and-miss type thing? Thanks.



This may be obvious, but how did you assemble the tank to the bowl?
The proper sequence is to put the rubber washer on the bolt, slide it
through the tank hole, put a metal washer and nut on the bolt and
tighten it down to seal the tank hole. Don't over tighten. Then
place this tank assembly on the bowl, add another washer and another
nut to hold it in place.