Posted 11/7/2013 09:38 (#3429891 - in reply to #3429732) Subject: Re: Tell me the difference between auto antifreeze and plumbing antifreeze
Sac & Story county IA
Here is an ad for RV anti freeze at HD. Says Propylene glycol based formula
I have been around water heating at a church with 60 year old system and the town water is terrible. I have seen dissimilar metal problems. And a lot of failures. I think I have those problems solved.
I am the designer, builder, owner, no warranty involved. Plumbers boat payment, either.