[C320-list] Winterization Plumbing on my C320

[Allan Field]

Hi Troy - Practical Sailor did an article in 2014, evaluating different
antifreezes. Bottom Line: No alcohol or ethanol mixes anywhere, as you
note; Propylene Glycol (PG) for potable water systems and not for use in
heads; Ethylene Glycol (EG) for use in the head and engine, not for use in
potable water systems. Vodka - not recommended!

Allan S. Field
*Sea Shadow* - C387, #103 (formerly C320 #808)
Columbia, MD


On Tue, Oct 12, 2021 at 11:39 PM Troy Dunn <troutwarrior at gmail.com> wrote:

> Using RV antifreeze (the cheap $3  PG/Alcohol mix) in your water supply
> plumbing is probably fine, although most shops would not recommend it.
> Not sure why.  Using this RV antifreeze in your engine is a bad idea.  For
> the engine buy PG only AF mixes.   If the label says the antifreeze is
> combustible it has alcohol in it which can damage seals and is actually
> corrosive for some parts of the engine.
>
> FWIW
>
> Troy
>