to the hot and the cold copper water line, so it is a lot easier to clean them in place and then cut them. once they are cut you are ready to take the water heater out. if you see a one man doing the job just call someone for assistance to be more secure. the person doing the job can drop it because it is heavy and potentially break a pipe and then you will have a mess all over.
when you get a new water heater, try to find a similar to the old one but just a new version. if everything was regular with the old one it 