Lowe’s has a portable irrigation pump that I will buy when mine glycol pumps die. My brother-in-law who does a lot of glycol pumping for snowmelt in ID came up with this.
UTILITECH – 1 HP – Portable lawn pump, Part # 0024840 – 120 volt it pumps 100% glycol like no tomorrow. Easy to carry frame and made for standard hose connections. ---------------------------------------------------------------------------- Dana Orzel Great Solar Works, Inc - NABCEP # 051112-136 E - d...@solarwork.com - Web - solarwork.com O - 970.626.5253 C - 208.721.7003 "Responsible Technologies for Responsible People since 1988" P Please consider the environment before printing this email. From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Christopher Warfel Sent: Friday, April 17, 2015 2:00 PM To: re-wrenches@lists.re-wrenches.org Subject: Re: [RE-wrenches] flushing DHW collectors We have had luck using a 25% solution of white vinegar, pumping the solution into the system until the pump cannot overcome the friction, capping the inlet(where the pump was pumping), make sure the outlet is open, let the sun superheat the solution and blow the obstruction out through the outlet. (Just have to make sure that no one, nothing is in the way of the outlet) Chris On 4/17/2015 2:05 PM, Glenn Burt wrote: When I was installing them and using Tom Lane’s book, he recommended a solution of TSP be used for cleaning lines prior to charging with HTF. 1 cup per gallon of water is what I read. He suggests running it for 30 min, then flushing with clean water for another 30 before charging with HTF. -Glenn From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk Herander Sent: Friday, April 17, 2015 1:21 PM To: RE-wrenches Subject: [RE-wrenches] flushing DHW collectors Hello, I have an older 10 collector system in which the glycol has stagnated due to a defective collector sensor, apparently for some time. I was able to drain the collectors, the cooked glycol is black with a good bit of sediment. I tried to flush the system with water but my ½ hp utility pump could not pump the water entirely through the collectors. Suction slowed down and stopped after just a few gallons, as if the pump couldn’t overcome the effective head of the system. I had no problem using this pump to charge the loop when it was commissioned. I suspect the collectors may be gummed up with cooked glycol. I guess compressed air is next to try. Are there any safe chemicals to use to purge / un-gum the collectors? Thanks. Kirk Herander VT Solar, LLC Proven PV provider since 1991 www.vermontsolarnow.com dba Vermont Solar Engineering NABCEPTM Inaugural Certificant VT RE Incentive Program Partner 802.863.1202 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org -- Christopher Warfel, President ENTECH Engineering, Inc. PO Box 871, Block Island, RI 02807 401-466-8978
_______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
