Since posting I found the source -- a hairline crack in the tank.

Is that something I can seal with caulking, or should I replace the whole
thing?


"AZ Nomad" wrote in message
...
On Tue, 03 Jun 2008 15:49:02 GMT, Ray
wrote:
An odd problem: Our toilet-tank has developed a leak which seems to come
from noshre. From observation the slow drip seems to be coming through the
porcelain itself, although there are no cracks are holes that can be seen.

It most certainly doesn't come from a pipe, because the area all around
the
bulls-eye of the leak remains completely dry.

Is this possible that the water could be seeping through a porous
procelain?

If so, would smearing the area with caulking compound, inside and out,
stop
the leak?


How old is the toilet? Usually what goes are the seals around the tank
water output to the bottom assembly and the seals around screws holding
them
together. Replace the seals; if that doesn't help, replace the whole
toilet. It just isn't worth putting any more effort into it when a new
toilet can be had for $130 complete.