Joe Oden, from All Seasons RV in Streetsboro, Ohio, shows how to properly setup the dual propane tanks on an camper (travel trailer). Have any questions? Give Joe Oden a call at 3305640222 or comment. Thanks for watching!
Here are the steps to properly setup your dual propane tanks (with full tanks):
Open both LP tanks
Turn the regulator knob/ switch's indication arrow to determine which tank will be used first. Once this is done, you now have a primary tank and a reserve tank. The regulator will use the LP in the primary tank and then automatically switch over to the reserve tank when the primary tank is empty.

In order to change an empty tank, close the empty tank, and then switch the regulator to the reserve tank. Once you have filled the tank, attach the hose and open the tank.