Phisherman wrote:
On Wed, 19 Aug 2009 15:29:18 -0700, Salmon Egg
wrote:

Does it make practical sense to preemptively replace anodes in
working water heaters in order to extend their lives? Is it better
to just wait until leaking begins?

Bill


I think water heater anodes are best left alone. But I do give the
tank an occasional 5-gallon flush. Supposedly a manufacturer
recommended an expansion tank to extend tank life.

If you don't have a pressure regulator or anti-backflow device, the expansion
tank is a waste. Unless you turn off the water but leave the tank on, and have a
tank thermostat failure.