"Bluesman" wrote in message
om...

SNIP

Any thoughts? Things to check?

Thanks,


Bluesman

If you have the cast iron heaters fed by black iron pipe, your heaters may
have resticted flow through them due to build up and corrosion. I was
working on a site where, when commissioning the HVAC controls system, we had
to verify each hot water heater operation. A number of them I could feel
the top half of the heater supply pipe get hot before the bottom half of the
same pipe did. The plumbing contractor removed one heater where we found
that the bottom half of the heatrer was filled with "sludge". The heater
had been in service for nearly 20+ years.

Something to look for.
Contech