A reminder for those who sanitize the water system.

Kit Carson wrote:
Is it necessary to completely fill the tank or can you just do half tank?

If you do half the tank, you can't get the solution on the top of the fresh water tank.

Actually, after I put in the bleach and fill the tank with water, I drive the RV around a hilly block about 3 times to both mix the bleach and slosh it onto all tank surfaces. Only then do I go home and run it through all of the lines/other tanks, and start the 4 hour time.