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Posted by Will (in IL) [98.215.26.138] on Wednesday, December 15, 2010 at 17:23:28 :
In Reply to: Re: Tighter than I thought posted by Grant in CO [64.234.252.6] on Wednesday, December 15, 2010 at 17:20:14 :
I believe (based on plumbing) that it's a water heat exchanger for the fire pump. Either to put some heat in it (keep it from freezing) or used to heat some solution used in fighting fires. I need to follow the lines a little better to be sure.