Winterizing water system?

Jerseydevil wrote:
Anyone put RV antifreeze into fresh water tank to pump and circulate into lines. Do not have bypass hose from pump to connect to antifreeze bottle.

You really do not want to do this.
No physical or biological problems with doing it, but it will take many, many gallons of RV antifreeze into the FW tank to be able to suck up a gallon or so into your lines.

Then come the spring, it will take many flushes of the FW tank in order to get that antifreeze and its associated taste out of your FW tank.

Just buy an RV winterizing kit and save yourself lots of money on antifreeze and lost of time on flushing the system repeatedly.