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Posted by Bart Coma on January 29, 2006 at 16:52:48:
I have recently had a contractor install a Weil McLain Ultra 155 boiler. I have determind that the contractor used CRYO-TEK 35-253, (blue in color) Antifreeze that is not aproved for this boiler. This condition went on for 6 weeks when the system was dained and the recommended antifreez (yellow) was added. How much damage was done to the aluminum boiler?