I'll definitely second the vote for the Rheem Marathon series. They're lightweight and easy to install and everything except the electric elements has a lifetime warranty.
My heater too is quite old but has performed flawlessly in spite of some rather unusual demands. I elevated it when I installed it and have a convection loop from a coil of piping wrapped around the fluepipe from my woodstove tied into it and the water in the Marathon sometimes exceeds 160 degrees during really cold weather.
|