Another thing I've read, in helping to prevent any type of galvanic action in your plumbing, is to change the Anode in your hot water heater. But this can sound like a much easier and simpler task than it actually is. I read not to even attempt it without a heavy duty, plug in electric impact gun with a good fitting impact socket. Otherwise if you try it manually, you will just drag the water around with the breaker bar, tweaking, and perhaps even breaking your plumbing connections.
Another issue is clearance, assuming you can get the thing out. I've got a 5' tall water heater with an 8' ceiling. That only leaves 3' of clearance to lift it out. Some guys say you can bend them as you're taking them out. I don't know, I've never changed one out. I know they sell segmented Anodes that have joints every few feet, in order to accommodate this type of issue. Again, I don't know because I've never done it.
Have any of you guys changed one of these out? If so what problems have you run into? My water heater is electric, and was installed in 2014. It looks to be in good shape. But looking at the outside doesn't tell you a damn thing. If it's not too bad of a task, I'd like to change it. It can't hurt. But if it's going to turn into a PITA, I'll just forget about it.