Ray wrote:
Thanks Mike -- Our system is steam.

Why do you suppose a reputable company of long standing wouldn't use the
standard?

Or perhaps the standard may have changed?

I guess if they installed a system which is truly incorrect and fails fairly
quickly they might be open to a lawsuit.

-- Ray

Unless the codes have changed or differ where you live, I always
thought black steel was used for steam. Did you ask them why they used
copper?