When I had a new steam boiler installed (3300 sq ft, 3 story house) several
years ago, the plumbers replaced the low return lines with copper. These
are the low lines at floor level (floor that the boiler sits on!) that
normally always have water in them rather than steam. I believe they
used 1 inch copper, possibly 1.25" I can't measure it right now as I no
longer live at that house. It works fine. Your building may have a bigger
system and maby not be able to use the smaller pipe.
There are no stupid questions, but there are lots of stupid answers.
Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf. lonestar. org
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