"Michael Baugh" wrote in message
t...
I suggest that you are asking the wrong question.
I'll ask you, why do you want to insulate it?

The condensation forms steadily on a tank when the
flapper valve leaks, causing a steady source of chilled
water to have to be delivered to the tank.

Not he only way it forms. Cold well water, repeated use with a few family
members. Don't know if they still do, but American Standard offered a liner
for just that reason.

Don't be afraid to open your mind to other conditions that your own house.