Originally Posted by travelin' texans
See your other post on the same issue!
Travelin Texans absolutely have it right as posted on the other thread. If both tanks are open it will automatically switch tanks. The valve that you manually switch is to let you know which tank you are drawing from.
Rick and Mindy
2013 Redwood 31SL, 2011 Ford F350 SRW, 6.7, Crew Cab with Firestone Bags, Titan Disc Brakes