As you can tell there is no one right answer for this one.

I suggest you can turn off the power and drain the tank when you are
going to be gone for very long. Just refill it and then turn it back on
when you next return. Not a lot of work and that is safer than a new tank.

--
Joseph Meehan

26 + 6 = 1 It's Irish Math
"Paul" wrote in message
...
Electric water heater is an A.O. Smith 40 gallon "low-boy" (short and fat)
about 10 years old. It's in a Florida condo unit, and from what I see,
no dielectric unions on the copper water lines to and from the heater. I
see a moderate amount of corrosion where the copper fittings connect to
the heater. No leaks. I don't see any rust or particles in the water at
the taps. I think it's a little slow to get hot water out, but not that
unreasonable.

Since this is a winter vacation place and I won't be there 24/7 I'm a
little nervous about the tank letting loose when I'm not there, although
it is on a first floor slab and a drain pan is installed...

If I do replace it, dielectric unions are supposed to be used, correct?

Home Depot's selection all seem to have only a 6 year warranty which seems
to be on the low end. Consumer Reports said that brand doesn't matter,
that the warranty does, i.e., more years = heavier duty tank linings,
insulation, etc.

Your input appreciated !

Thanks.

-- Paul