Hey,
This is the stuff I use:
PEAK | RV & Marine AntiFreeze | Antifreeze / Coolants | Auto Products
RV & Marine AntiFreeze
PEAK® RV & Marine Antifreeze is formulated for winterizing all types of potable (drinking) water plumbing systems. This product can be used full-strength to winterize boats, recreational vehicles, trailers, vacation homes, swimming pools, and a variety of other winter storage applications. Specific benefits include:
Burst-proof protection to -50°F guaranteed!
Safe for brass, metal, copper and plastic pipes (except acetate)
All ingredients are considered GRAS (Generally Regarded as Safe) by the Food and Drug Administration
No mixing required, can be used full-strength
It's ethanol based and non toxic.
Barry
QUOTE=Jaramaz;1089277]Hm, seems at least I act differently ...
for me antifreeze and coolant is the same thing. OK, I know, it is not. But I use the same ingredient, glycol (ethylene or propene) for both.
In the motor, on the "fresh" water side glycol is used to form the coolant. Change every 5 year or so (sometimes more often).
On the raw water side, I run through glycol, usually diluted ~50/50 and blow out all residuals with letting the mtor run until dry. This glycol serves two purposes: no freeze in the raw water system, and then the glycol does some rust preventing as well.
Glycol is of course toxic, very much. All freshwater systems are just emptied. totally. No need for antifreeze (and certainly not glycol). Seacocks left open, but they must be completely emptied - there is s pocket which should be empty.
Never put any glycol in the bilge, as it is not a very nice compound. Bilge should be dry - seldom any problem for me.
The antifreeze that some are using, what is that? Methanol? (you are not using ethanol for that, are you? Or, is that why you look forward to spring?)
Interesting with the differences.
/J[/QUOTE]