I did mine just before Christmas. My old tank was a 14 yr old electric and one of the elements kept burning out. Also I have plans for my basement, and have been working towards moving all of the mechanicals out of there for a couple of years now, and the hot water heater was the final piece.
It’s temperate enough where I’m at that I could do an external tankless mounted on the back of the house, so that was what I chose. The water heater was $899 online, plus I paid a buddy about $1800 to help me install it, including replumbing the whole house for both water and gas. We tore out all the old piping that hung below the basement ceiling- both galvanized water and black iron gas pipe- and replaced with pex and CSST routed in the joist bays and crawl space. Now I can put a new ceiling in the basement without pipes hanging beneath it.
We were probably not supposed to do the gas work ourselves but what the city doesn’t know won’t hurt them. I read all the codes and I’m confidant everything is compliant. I’ll probably go ahead and get the job permitted and inspected this summer. I didn’t do it at the time because I didn’t want to get red tagged over something and have no heat for christmas. I pressure tested the gas lines, so I know there are no leaks, and everything is bonded to ground as per code.
Heh. I guess I’m still kind of proud of this job so I want to tell everybody about it. It still makes me happy every time I take a shower!