Be sure to set both thermostats and that you have the right size breaker
The tank was very easy to hook up, even though there were no instructions in the box (we pulled them down from the web). To save money, we bought and installed it ourselves - me, 50-ish female for the connections, plus my 20-ish son for the muscle. (I do have some basic experience with plumbing and electrical, so this is easy if you follow the directions).
1. Installation was pretty straight-forward, we used copper pipes with Sharkbite connectors.
2. >> follow the directions, and be sure to
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leave the taps open in the house to relieve pressure when you fill the tank.
3. Be sure that your breakers are sufficient. I had to switch ours out to 2x30 to get hot enough water. Again, easy.
4. Be sure to set both thermostats. This one got us for a while...lacking instructions in the box, we would have hot water for a few minutes, then it would go tepid. There are two separate panels, each with a thermostat, so be sure to set them both.
>> Note: That is the worst feature of the tank. The thermostat controls are tiny and very hard to reach and read. Use a small flat head screwdriver, and have someone hold a flashlight...(or have the 20-something with good eyes do it, because that is clearly who designed these controls).
Also note that the control is clearly designed to have a dial attached, so you turn it clock-wise to turn up the temp, even though the indicators are below it (might imply left to right is hotter > that is not correct) - while a bit counter-intuitive, no big deal once you can read the details.
5. Set it and forget it.
We had hot water in less than an hour.