New builders also don’t take into account the weight of water in water cooled machines which is why it’s better to use an air cooled one on a smaller hobby machine. Plus water is another thing I would want to keep away from wood. I got some lubricant on my waste board the one time and it had to be replaced because it swelled up over night.
I take it you use an air cooled radiator in your lounge then so it does not ruin the carpet