It is our experience that the smaller circulator should always be located before the larger. Otherwise the smaller port of the smaller pump could result in back pressure on the larger pump decreasing its effectiveness. It is also recommended that a 6-8" min. nipple be installed between the circulators.
Garrison Garrison Riegel Project Manager Solar Service Inc [p] 847-677-0950 [f] 847-647-9360 www.solarserviceinc.com <http://www.solarserviceinc.com/> NABCEP Certified Solar PV and Thermal InstallerT _____ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nathan Stumpff Sent: Friday, August 17, 2012 6:22 PM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Booster pump Thermal wrenches, When plumbing a booster pump in series for a solar drainback system, should the booster pump go ahead of or behind the main circulator? Cheers, -Nathan -- Nathan J. Stumpff - Arctic Sun, LLC NABCEP Certified PV Installer #091209-175 NABCEP Certified Solar Heating Installer #032412-14 nat...@arcticsun-llc.com Office: 907/457-1297
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