I just did mine yesterday. Set switches to "country fill", Put the proper bleach and water mix into a large pitcher and attach a short hose to the water inlet.
Turn on the pump and it will pull the water into the fresh tank. Then set the switches to "normal" and run the faucets until you smell the chlorine mix in the faucets.
Let it sit a while and drain the tank and add fresh water. Then flush the faucets again to clean out the chlorinate water.
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
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