On 21 Oct, 10:27, "Edwin Pawlowski" wrote:
wrote in message
If it hasn't leaked...it may be fairly safe. You could dry-out the
tank and put some silicone caulk on the crack.

BAD advice. Unlike metal, porcelain does not flex or bend and is prone to
catastrophic failure. It may last for a time, but it may just fall apart
and make a disaster once the water starts running and no one is home.

I'd turn the water off to the fixture and go shopping for a new toilet.

Unlike metal, porcelain does not flex or bend and is prone to
catastrophic failure

When I said my neighbor's hairline crack "let go", I should have
mentioned that he came home to find his toilet tank in pieces on the
floor. "Catastrophic failure" would be the proper term.