MDKMDK wrote:
Walmart pink stuff. Poly-Prop based, works, inexpensive.
Walmarts brand is "SUPERTECH", while is the "pink stuff" it IS a mix of Poly-Prop/ETHANOL/water.
PER the SDS sheet (formerly called Material Data Sheets) found
HEREAccording to the SDS it contains 13% ETHANOL AND even contains 2% of METHANOL!!!
While it will prevent freeze damage, I would not wish to put it in my fresh water system considering it does contain slightly more than trace amounts of ETHANOL..
I would only use this to winterize the traps..
Right now as of my last visit a few weeks ago it IS THE ONLY "pink stuff" that WM is selling..
To be very clear, ALL "RV ANTIFREEZE" is sold as "pink stuff", that is how they differentiate between types and uses..
Do have to be aware, I have noticed that windshield washer fluid as of late comes in all kinds of colors, some pretty close resembling the "pink stuff" color so READ THE LABELS, do not depend on color only!!!
If you have ANY doubts or questions, you can easily look up the SDS sheets on the wobbly web.
Myself, I just connect my air compressor to the freshwater system and blow out the water then open all of the low point drains then when finished leave all of the faucets and low point open all winter.
Has served me well over 18 yrs of RV ownership, only lost one toilet valve and no other damage the first yr of RV ownership when I accidentally closed the shut off valve to the toilet which trapped water in the toilet valve.
Works for me, but Your mileage may vary..