Logic dictates that you NOT overfill the tank.
With the water pump and water off open a faucet to break the vacuum.
When water stops coming out of the overflow close the faucet.
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