Dr. Hardcrab wrote:

"Ken Hall" wrote in message
...
....

I agree with both statements, but I ask you the same question -- why
doesn't opening hot water faucets also work?

That'll work too....

But probably not if the water heater is above the faucet, i.e., in
the attic.
--
Phil Munro Dept of Electrical & Computer Engin
Youngstown State University
Youngstown, Ohio 44555