We took the 18 gallon out to verify the draw straw was in fact near the bottom... when running jenni could get 3 to maybe 4 hours before running dry.
After removal discovered how tank was only about 8 inches deep but 4 foot long maybe 1 foot wide. Draw straw was ok. It appeared any tilt of trailer to curb side caused fuel to run away from pickup point on road side of camper.
We normally run jenni / air conditioner while traveling to keep animals cool .
It was a PIA to stop ever 3 hours when I carry 115 gallons for the truck.
Anyway after the discoveries, I switched the fuel line to the 30 gallon tank and added another fuel pump to.help augment the distance to jenni.
2005 Dodge Ram Laramie, SRW
5.9L Cummins Turbo Diesel 24 valve
2013 Forest River Thunderbolt XLR 380 AMP
2010 Star Motorcycle Stratoliner Deluxe