Garet Posted July 9, 2012 Report Share Posted July 9, 2012 I've not run into one of these before. What does it do? And the "Return Flo-Tee"? Background: I normally see all zones originate off a manifold at the boiler. Piping in this house was set up more like a branching system, with zone valves spread out in the crawl space. Click to Enlarge 43.12 KB Click to Enlarge 48.48 KB Click to Enlarge 50.25 KB Link to comment Share on other sites More sharing options...
kurt Posted July 9, 2012 Report Share Posted July 9, 2012 It's an aqua stat controlling something, probably just what you described. The tee balances the supply and return flow off the supply riser and the primary. Link to comment Share on other sites More sharing options...
David Meiland Posted July 9, 2012 Report Share Posted July 9, 2012 Still curious about that tee. Is it somehow functioning as a tempering valve? Link to comment Share on other sites More sharing options...
Bill Kibbel Posted July 9, 2012 Report Share Posted July 9, 2012 Still curious about that tee. Is it somehow functioning as a tempering valve? Link to comment Share on other sites More sharing options...
Tom Raymond Posted July 9, 2012 Report Share Posted July 9, 2012 So someone zoned it after the fact? And, is that lead sweat into those copper fittings? Link to comment Share on other sites More sharing options...
Garet Posted July 10, 2012 Author Report Share Posted July 10, 2012 So someone zoned it after the fact? From the size of the pipes, I think it was laid out this way originally. And, is that lead sweat into those copper fittings? No. Galvanized steel tubing. I've been told it was basically electrical conduit. Odd how it shows up at just the time when we started using copper drain pipes. I've never seen a problem with it, but always cautioned my clients that it's unusual. Link to comment Share on other sites More sharing options...
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