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
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.
Maybe use epoxy injection? Maybe you can use a plastic liner, glued in
place with holes for the water supply, tank bolts, and water outlet
and thus achive a complete kluge?
Just replace the damn thing. Is your time worth nothing?
If you can find some water glass you can make a permanent repair by just
sloshing it on the inside and brushing on more carefully on the outside.
It's quite invisible. I have a tank that took a major league crack 20 yrs
ago and sealed it thusly. If it was a normal color that I could match to
the tub and sink I probably would have replaced it, but it's a Rheem fixture
and not made anymore. It's a rather unique color, too. Fixing it was my
I would think you'd also have good luck with something like gorilla glue on
the inside only. I don't know where you'd find water glass these days, but
if there's an old-line farmer's type hardware store around your area, that
would be a good bet. I'm sure you can find it by googling either 'water
glass' or 'potassium silicate'. Maybe just ask a plumber.
If you dry the tank out very well, you could try rubbing epoxy into the crack,
especially from the inside. Squeeze it in by rubbing over it with your finger,
then leave a layer over the crack in addition. Sand the surface lightly first.
If the cracked area shows, rub the epoxy in from the outside, but then wipe it
off show it doesn't show. Otherwise, leave a layer there also.
If its humid in your house, and the water entering your tank is cold,
it will condensate which will eventually leak on the floor.
A good way to test is let the water in the tank get up to room
temperature or pour a little warm water in the tank.
You may be able to stop the leak temporarily but if it is cracked it is
liable to fail catastrophically w/o warning in which case you have a big
problem--particularly if it happened to be while the house is deserted
for a full day at work, etc., ...
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