Originally Posted by harvey_birdman
I replaced my hot water heater when it failed a few years ago with instant on. Just know that instant on is often more expensive than a heater (at least for initial purchase and installation but not over time) and for those with water heaters still working there's little incentive to go out and drop a grand to replace it.
And to be clear, I replaced the heater myself. Because I'm a manly man.
Good for you, and here's how handling it non-manly get's you screwed....
We did the same thing about 2 years ago. Our old water heater was just outside the back door and in it's own little wooden "shed". As prep, I tore out the shed and the water heater and had it all ready for the install the coming morning. Note that I wasn't going to be there so I explained to the little lady everything I did and what was taking place so she could just guide them through it. I got a msg midday that it was all done and working fine.
I get home and there is no new instant-heater where the old tank used to be. In fact, all the plumbing I left for the in/out was, well, gone. (head scratch).
Me: "Honey, where's the new water heater?"
Reply: "I didn't want it by the back door since it was unsightly, so I had them put it on the side of the house so we don't see it."
Never mind that the water heater was located in the perfect, closest point to every faucet in the house and the new location is the furthest possible point from seemingly everywhere.
We now have instant hot water - oh yes we do! - but takes a one to three minutes
(depending on route) to reach a faucet. And, of course, to tidy up the area they were supposed to use but didn't, they chopped off all the "unnecessary" plumbing so just moving it back is a much bigger job than it should have been.
Thankfully we live in Florida where hot water isn't quite the necessity it is in other locales...