Here we are mid-May and I'm finally dewinterizing and sanitizing my water system. (Wish I could have had to do it earlier as we had a slight opportunity to go camping in April that vanished
Pretty simple procedure in the Axis as there are only two sinks, shower, toilet and outside shower. Fill the water tank with water + about 1/2 cup of bleach (I put about 30 gallons of water in). Pump the solution through the camper, let it sit for a few hours, drain tank, flush tank, refill and reflush with clean water... Note: Do all this with the water heater bypassed; you don't want to be filling the water heater with chlorine solution.
Of course things aren't always that easy: The 24.1 is very notorious for having a slow drain on the fresh water tank. Here is a helpful hint: Turn the water pump on and open both low point drain valves (they are right next to the tank drain valve). I was able to completely empty the 30 gallons I had filled the tank to using the pump + low point drains in about 15 minutes.
With me being in Michigan: Just wrapping up putting everything away and it starts to snow...! LOL