Purchased a new fifth wheel 2 months ago been in the shop for numerous things, they are telling me to leave propane tanks open for them to work correctly , the tanks don't empty out completely
Fyi The regulator switches over when the "in service" tank dropes below 10psi. usally thats empty but in cases of hi demand you could draw the tank down below 10psi but still have a couple gallons left. once it warms back up you could use it out.