Can RV anti freeze be re-used?

wkswenson wrote:
Just be careful when purchasing "cheap" anti-freeze - review the contents....


Not all RV Antifreeze the same

From the link: "That other antifreeze contender, propylene glycol, is also an alcohol of sorts. Technically a “double alcohol,” this is not like a “double shot.” But like grain alcohol, it also raises the freezing point of water."

That makes zero sense. The intent is to LOWER the freezing point, not raise it.

I wouldn't bother, because it means something else to store. Were I in a colder climate, I'd blow the lines out, run the RV antifreeze, then blow the lines out again, leaving a good amount in the traps and toilets.

brirene wrote:

valhalla360 wrote:
15-30mintues of time and effort.

:? Putting the cost issue aside, how the heck are you doing this to take that long? I take an empty bottle and hold it under each low point drain, open the valve. 15-30 seconds maybe. Not much effort at all.

lets see, climb into rV to open some faucets. crawl under RV to unscrew the two drain plugs. fill bucket, etc. and repeat.
but I think I do like the idea of just letting hot and cold low point drains to drain, either on ground or into bucket to dump into black tank.
bumpy

valhalla360 wrote:
15-30mintues of time and effort.

:? Putting the cost issue aside, how the heck are you doing this to take that long? I take an empty bottle and hold it under each low point drain, open the valve. 15-30 seconds maybe. Not much effort at all.

You are probably looking at around $2-5 savings but an extra 15-30mintues of time and effort.

I make enough that the cost savings doesn't justify the hassle.

wkswenson wrote:
Just be careful when purchasing "cheap" anti-freeze - review the contents....


Not all RV Antifreeze the same

I "reviewed" that and it was just a bunch of jibber jabber to be able to write a column.
I think saving it and dumping it into the tanks to ensure they don't freeze is a good idea, but for a few $$$ why not use fresh?
bumpy

Before reuse'n Propylene glycol I'd quick test the dilution ratio with a Refractometer.

My RV takes less than 2 gallons to Winterize. At $2.50 or less per gallon, why reuse it. A few years back i purchased 15 gallons of RV antifreeze at $ 1 dollar a gallon, (seasonal sell off) . still have 5 gallons on hand after winterizing our unit Wed afternoon.

It will be diluted and less effective. The risk is not worth the savings.
Buy fresh anti freeze it is not that expensive! If you are taking the time to do it. Do it right.

Ok, this may be just a dumb early Friday morning question.

If one blows the lines out completely, and ensures there is no water coming out any of the fixtures; why introduce the RV antifreeze if things are dry??

as for re-using engine coolant, one has to be careful of the Ph if you are reusing it. It "may" look ok, but.....