Okay, I received a reply from Koender to my query regarding an acceptable air line antifreeze.

My question, as put to Koender:

to sales


Good morning..

I'm writing in regards to your freeze control unit, specifically the recommendation for isopropyl alcohol as the anti-freeze agent. My question involves the possible side effects of using alcohol in an environment containing plastic and rubber components. I've seen too many instances in other applications where alcohol caused deterioration of both rubber and plastic....I realize that isopropyl alcohol is a wonderful antifreeze, but have the long range effects of adding it tinto the system been evaluated? I would feel safer using RV antifreeze in this application, and would greatly appreciate hearing your thoughts on this.

Koender's response:(and I really appreciate them taking the time to respond...that means something to me in this day and age.)

Doug Hicks [email protected]
Mar 30 (1 day ago)

to me, sales


Tony,
Many customers do use RV Anti-Freeze - others use methol hydrate. As manufacturers of the systems we recommend using any non-toxic alcohol based solutions. Isopropynol being one of them.
Regards
Doug

So it appears that either is acceptable. I am confused as to the referencing of isopropyl being non-toxic. According to the msds I saw, it's listed as being highly toxic to aquatic life?

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.