Truck has been sitting for 4 years with no bed. Steel gas line across frame rail to tank. 3 different lines. 2 go to the tank and 1 goes toward cab, The latter has a barb as if it should have a hose attached, but doesn't. Anyone have any idea what the line could be for? Also, the tank photo shows a UV damaged part which should have a ball in it. Tank has no problems other than where the arrow points. Appreciate your thoughts.



This is missing parts. Will the tank function as is or do I need a replacement tank.

ched picture

 

it is a roll over valve/gas tank vent.