New supply lines warm to touch
We are having a new bathroom built and the plumber installed new supply lines (hot and cold) to the shower location the other day. Both of those supply lines (copper pipe) are hot/warm to touch - about 110 degrees. We have not used these lines yet, so we cant come up with a reasonable explanation for why they are both hot to touch.
None of the other pipes - the supply to the vanity/sink area or the toilet are hot.