What if you aren't? I am in the same situation as dahlia right now, our unit from 1997 bit the dust finally (bought the house in Sept of 2023). My wife went to Lowes and got quoted $4300 for new water heater +install, and my brother in law told her to just buy the heater because I (thanks, guy) should be able to simply watch a you tube video and figure out how to install it, therefore saving us something like $3500 for them to do it. But I have no experience with such things and my wife doesn't want me messing around with gas lines when we've got 2 kids 3 or under in the house.