If you use the dropmaster properly you can get nearly all of the water out to the point that when you pull a head you get just drops of water. I would do it with the antifreeze, fill and repeat a couple of times to make certain there wasn't enough antifreeze left to create a problem with mixing. We would use the DM and then pull a few heads to see what we had and if it was as empty as we expect, I would not have a problem refilling it with new. ________________________________ From: Caleb Brogan <caleb.bro...@koorsen.com> Sent: Thursday, March 21, 2024 12:55 PM To: Discussion list on issues relating to automatic fire sprinklers <sprinklerforum@lists.firesprinkler.org> Subject: [Sprinklerforum] Re: Mixed antifreeze types
Dropmasters work great, but I wouldn’t rely on it to pull all the existing antifreeze out of every drop just by pulling a few. I have no idea on the potential mixing of the two solutions, but my personal opinion would be that Freezemaster is pretty expensive. The customer is paying for it, might as well make sure it’s all new. It shouldn’t take more than a day or two to drain 100 drops with a couple guys working (if the system drains well), so I would take the time to pull them out and make sure it’s clear. I haven’t tried to use a dropmaster on antifreeze though but with water it will suck a head into the RC from a foot away if it is working correctly. Thanks, Caleb Caleb Brogan | Sprinkler Systems Designer OH# 54-25-4815 & NICET# 147230 KOORSEN FIRE & SECURITY 727 Manor Park Dr, Columbus, OH 43228 P 614.853.5665 | Ext. 6512 | M 614.867.6791 caleb.bro...@koorsen.com<mailto:caleb.bro...@koorsen.com> | www.koorsen.com<http://www.koorsen.com> 24x7x365 Service: 614.878.2228 | servic...@koorsen.com From: Fpdcdesign <fpdcdes...@gmail.com> Sent: Thursday, March 21, 2024 1:28 PM To: SprinklerForum <sprinklerforum@lists.firesprinkler.org> Subject: [Sprinklerforum] Mixed antifreeze types I have a client with a rather large (330 gallon) antifreeze system that is looking to upgrade to an approved solution. There are approximately 100 pendent sprinklers on either straight drops or swing joints. The contractor has proposed pulling a few drops and using a Dropmaster to try and drain the rest of them. I have no personal knowledge of how effective a Dropmaster is. Would using this be acceptable? Is there a way to tell if it worked? If there was a small amount of glycerine solution remaining, would that be a compatibility issue with Freezemaster? I will probably contact Lubrizol as well but am also looking for experience. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080<tel:860-535-2080> (ofc) 860-554-7054<tel:860-554-7054> (fax) 860-608-4559<tel:860-608-4559> (cell)
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