I have tried to pour boiling water into the bowl in the hopes of it
helping to break up the clog while I was using the plunger to break
the clog. However, I have heard some cracking sound near the toilet as
I flush the boiling water down the drain. I don't see any water
dripping down the pipe in the unfinished basement, but I'm still quite
concerned that I have broken something. Can someone give guidance on
what might happen in this case?
Well if the bowl cracked someplace out of view like around its trap or horn
you know that can't be good. Keep an eye on on things in the basement where
the pipe goes up through the floor. Make sure wood is staying bone dry.
Remember, water may only leak when it flushes.
It probably would take an awful lot of it but boiling water isn't the best
thing for a wax seal I bet.
The crack may be so fine that you can't see it and water won't leak yet.
Now, normal expansion and contraction may enlarge the crack so that it
will leak in the future. The worse that could happen is that it could
split in half while you are sitting on it.
I poured very hot (not boiling) water into a toilet once. The beeswax
ring that seals the toilet base to the waste pipe flange melted and
it rained in the room below.
My advice: don't pour hot water into the toilet.
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