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Hmmmm......I think you guys may have answered a question for me as well. I was having some issues with getting the pump to pull antifreeze too. It seemed that the pump was air locking. It would pull some but very slowly and the antifreeze seemed to be highly aerated coming out of the lines. I was thinking there might be some surfactant (soap for those of you who are not Chemists) in the antifreeze though I failed to see why they would have any in the mixture since it would make it hazardous. Now I can see where I might of been sucking air in OR if there is a check valve on the suction side of the winterizing line I can see where that would be an issue as well (thanks to MD Firefighther for that bit of info)!
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