
10/07/2025
What's the deal with my weird water heater plumbing?
My 25 year old water heater (that still works ok) is on the shortlist of things to replace before shopping around for better home insurance. The hot water outlet seems to be split into a 3/4" pipe and a 1/2" pipe. When I use my thermal camera, I can see that the 1/2" is not nearly as hot as the 3/4" portion is. Any idea why it might be split at the hot outlet like that? The washing machine is in the same room, just left of the photo if that could be a factor. And the TPR valve is also hard plumbed into the wall, with no outlet outside that I'm aware of, so I have to assume it feeds into a drain somewhere in the wall?