[DutchmenSport]

If you have the outside shower (blue coiled hose) in your convenience center, you can attach the other end to your fresh water fill - garden hose connection.

Now, add your sanitizing solution in a bucket and pump the solution using your winterizing port. You'll need to flip the valves to "winterize" and still by pass the water heater. But then simply turn on the outside shower (blue coiled hose) and it will pump the sanatizing solution into the fresh water tank. Once the total amount is pumped into the fresh water tank, you can now add more water to the fresh water tank (the conventional way with your garden hose), and this will dilute the solution.

Now you can easily run the solution through all the lines, and now put some in the water heater too if you want to sanitize it too.

This process will super sanitize the winterizing line and the line running from the fresh water inlet (garden hose) to the tank.

Once in the fresh water tank, running the on-board pump will dilute the mixture there and anywhere else the stronger solution flowed first.

What you are basically doing is winterizing the outside shower line with sanitizing solution. But rather than dumping it on the ground, you are now pumping it into the fresh water tank. (hope this makes sense).

Actually, you can sanitize the entire system using the winterizing port if you want without filling the fresh water tank first if you want. Again, instead of using RV antifreeze, just use the sanitizing solution. However, you will want to pump it into the fresh water tank too to sanitize it. I think, that's why its easier to just pump a strong concentrate of the solution into the fresh water tank first and then dilute once it's in the tank, then run through the rest of the water lines.

That's how I do it.