"MW" wrote in message
...
I moved to a house that is over a century old and noticed most of the
upper
floor water lines to be
newer copper but the lower main lines galvanized steel

Won't this lead to rapid deterioration of the lower water lines?

I would also like to know general guidelines for avoiding galvanic action
on
piping and so forth
I need to have a water heater installed andwas told to use fittings which
use a
mix of different metals in it's construction...
Why is this, and how does this negate galvanic action by merely being a
mixed metal fitting?

Thanks
Joe



This is a lay person response based on 30 years of personal experiences.

The problem is greatly overstated.

Most problems will occur at the point of joining the different metals.

Purity is best but not always practical. Keep the transition in a visible
location.

Your water heater will die in about 10 years or 1 year after the warranty no
matter what you do or don't do.


Colbyt