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Posted by headstamp on May 31, 2010 at 12:02:00:
I see in the specs for this boiler that it only has a 1 1/4" return size. Does anybody know if this is bushed down in the casting or is this the max size of the tapping. I'm going to have 5 to 6 zones running into this boiler and that piping size is too small. Would like to go to 1 1/2" like the feed side of this boiler.
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