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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