N2VZD TIM n2vzd at aol.com
Fri Apr 26 20:15:02 EDT 2019

The fumes from Brake clean and other sprays that hide nasty chemicals (even some paints) ruin heat exchangers and stack pipes in heating systems quickly. The fumes that go thru the flames form an acid strong enough to ruin even stainless steel.  Somewhere I have pictures. If you see rust on seams of stack pipes , you may have a rotted leaky  exchanger.Regards , Tim Colson      dragging the subject out too long ..sorry

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