I "winterized" our Pleasure Way Pursuit yesterday. I drained the water tank down to about 8 gal. and poured 3 gal. of RV anti freeze into the tank. Then I ran all the sink faucets both hot and cold, ...
Just wondering why you left that much water in the fresh water tank, and why you did not drain the water heater. If you had drained the water heater and used the bypass that would have made the anti-freeze "stronger" for the rest of the system and taken the worry out of freezing up the water heater. Don't know if the diluted anti-freeze will be a problem, but if you are going to the expense of using the pink stuff you may as well use it full strength in my opinion.