I just had a plumber install a new 50 gallon water heater, but the cold water pipe is installed to the hot side (the left pipe when facing the front of the heater) and the hot water pipe is installed to the cold side (the right pipe when facing the front of the heater). Is this ok? I thought that the cold water pipe had to go into the cold intake value and the hot water pipe would be connected to the hot value.
So I called the plumber and he said that everything is installed correctly. And he wouldn't change the plumbing.