Adam, on the newer motorhomes they ( mfg ) used plastic hose . Such as air line used for the air brakes. My suggestion I would get 50 feet of 5/8 air line that will come in a roll. Than make note
of what you will need in brass air line fittings of which two fittings wil need one end for pipe thread
and other end to air line . Note a brass air line fitting has a hex nut that goes on air line first , than
A brass farrel
that slides on outside of plastic tube , than a steel insert that goes into the plastic
tube. Step 2 attach the pipe fitting end of brass fitting into the water/ fuel filter intake end, last
Take plastic air line with hex nut and attach to brass fitting body. Repeat the same for pickup
tube in center of fuel tank. Look over the fuel tank because you will need to drop the fuel tank
To get at the pickup tube. Last the brass air fittings will make a air tight connection that will not
Allow entry of air. Plastic hose is rated for 250 psi and up. Be sure that you install hex nut , Farrell
than steel insert into center of plastic hose. Last plastic tubing is flexible but do not kick or sharp
bend in tubing or hose on install. Check with Caterpillar on price of there fuel hose and nessary fitting
It might surprise you on cost and go with them. Recheck on how you are going to drop fuel tank
of which will need a helper. Might want to check what Cat will charge to install hose
Dave Atherton Retired Cat Mechanic