Last winter I followed the
Scamp guidance that their web site offered. It was similar to the video provided In this thread with one exception (that I remember). I did start by pouring a couple gallons of RV antifreeze into the fresh water tank. I then moved the pink stuff around using the pump. I also filled the traps and used the shower drain pump.
The difference was I used the hot water faucet to get the antifreeze to go through the pump for the hot water heater. That did put some antifreeze into the hot water tank.
Scamp doesn’t provide a hot water heater by pass line. It worked fine as far as I know. Is this a bad approach? Why did they remove that step in the most recent Video?