¡Look at (and READ) the pink stuff jug!

[Matt_Colie]

On the advice of a friend that used to be a product engineer for a major OE chemical supplier, I have started reading the jugs of RV anti-freeze that I have.

The old ones were straight Propylene Glycol (safe to drink).

The newer ones have giant lettering that say SAFE, but do not say what they are safe for....
They are denatured alcohol, gycol (unspecified) color, water and something I don't remember. If I had this in my potable system, I would be very careful to flush the system very well in the spring.

You can probably still find PG based anti-freeze, but it won't be cheap.

Matt

[ktmrfs]

new ones I've seen do NOT have denatured alchohol (methanol + enthanol). They have ethanol and propolyne glycol. Clearly stated on the label that it has ethanol. If it had methanol it would have to state so, and a clear warning lable of hazard for consumption.

Ethanol (ethyl alcohol) is what's in alcoholic drinks.

I still prefer to use the strait propolyne glycol stuff, which is available, but not as cheap.

[jmtandem]

The newer ones have giant lettering that say SAFE, but do not say what they are safe for....

I always interpreted SAFE to mean that the RV antifreeze was safe for the pipes, valves and tanks, not for a person to drink. Always flush in the spring and I use a little bleach to clean out any stuff in there that should not be in the spring. And then flush a few times.

[DutchmenSport]

"They are denatured alcohol" ... ah ... I never thought of that? Fresh water tank ... great place to stash the moonshine! (And it will sanatize at the same time, if the pipes don't melt first!)