Apparently the plumbers failed to glue together the drain from the massive bath tub in master bathroom - that was directly above the dining room. First bath in new house, must have been nice until the end.
Must have been the same people who built my sister's old place. She took a bath in the new house, came downstairs to find a flooded first floor.
Never seen it with just the hot. But ours had hot and cold hooked up. The water lines for the toilet kept freezing in the winter (close to the basement window under the floor) My dad got sick of it so hooked in to the washers hotwater and cold to stop it. worked like a charm.
We tapped the hot water line and used it in a small line around our drains in the kitchen sink under the floor as it would freeze solid in the winter. Open the hot tap on the kitchen sink (used for tea etc) and let it run a couple minutes and before the sink could fill it was draining You learn lots of tricks living in a near 100 year old home that originally did not have running water inside.
This may seem far fetched, but imagine a world where there is no worry about keeping people out. Having locks on the outside for safety concerns? Wow. I'd never do it, but just imagine.
There was an issue with one of the other houses in my neighborhood last year. Brand new construction, and the night before the soon-to-be owners did their final pre-closing walkthrough, thieves went in and stole all of the appliances, toilets, granite counter tops, etc. And they couldn't be bothered to shut the water off first, so water flooded out of every line all night.
That reminds me of the bank in Winnipeg, night before the grand opening (still considered a construction site), theives stole all the cash from the ATMs, several million in cash, because the security system hadn't been activated yet.
One of my favorite stories I heard was they hooked up the hot water supply to the toilet.
I have a house that was previously owned by some Filipinos and the toilet was supplied by the hot water.
Actually that is because solid organic waste dissolves in hot water.
Actually it also prevents tank sweating as well. The hot water line will cool down to the ambient much easier than the cold line with the 50deg water from the well will warm up to the ambient.
Actually that is because solid organic waste dissolves in hot water.
Wax rings "dissolve" in it, too. Not a good thing.
I've been in bathrooms with heated toilet water. Apparently a wax ring isn't used. There are other materials out there. It's not a pressure seal. I know of a few o-ring seals on Boeing aircraft that would work and probably outlast the toilet.