I use the city water side, no real reason just easy for me that way.
After flushing the A/F out I add a 1/4 cup of bleach for every 15 gallons of water to the fresh tank and then let it sit over night.
In the AM I use the pump to empty the tank by way of all the faucets and the outside shower, I also open the low point drains.
Refill the tank and drain until there is no bleach smell.
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping