Auxiliary Truck Tank & Toolbox Install

A beautiful day without much to do...so, I decided to install the auxiliary fuel tank I bought.  One of the things that irritates me is having to fuel the truck while towing Voyager (fifth wheel) and since the truck only gets around 10-11 mpg while towing, the best option for me was to install an extra tank that can pump into the truck's primary tank.  The F250 gets about 275 miles towing because the tank is only 28 to 30 gallons.  The new tank is made by RDS and I ordered it online.  It has an additional 50 gallons so I'll more than double the time I can tow.  This is the tank:

An additional feature is a small integrated toolbox.  Looking at the pic, you can see the separation.  There are 3 tabs on the tank--left, right, and front--that I had to drill through and then continue through the bed of the truck.  Before I drilled through, I looked thoroughly underneath to ensure I wasn't going to hit something that didn't need drilled like say A FUEL TANK.  No problem.  Now, I have the holes lined up, I pulled the tank out and tilted it up so I could install the valve and fuel line.  While out, I also drilled the hole through the bed for the fuel line and covered it with wire cover so the metal from the cut hole didn't rub through the fuel line.

Looking at the pic above, you can just make out the hole with the wire cover.  It is to the left of the valve.  The purpose of the valve is to shut the fuel flowing to the truck tank.  Just below the valve, you can see where I installed the carriage bolt through the tab and the bed of the truck.

In order to pump fuel into the truck's tank, you have to remove the filler tube and cut about 4 or 5 inches of the tube off, and attach the in-line kit.  At Norther Tool (online) where I bought the tank, they also sell this "Gravity Feed Kit".  I didn't like the thought of gravity feeding so I decided on using a switch-activated pump.  Gravity feed is slower and some people have had issues with leaking.  So, I bought the kit and between the tank to the filler "T", I installed the apparatus below.  

Diesel flows from the auxiliary tank valve through a line to the clear fuel filter on the right in the pic above.  It continues through the pump which I wired to a switch in the cab of truck.  The filter should keep additional debris out of the main truck's tank and help the fuel pump last longer.

Take a look at the pic above and you see the assembly installed.  Because the pump and filter are very lightweight and the fuel lines secure the assembly pretty well, I opted to just zip-tie the assembly in a few places versus hard mounting the pump.

Looking at the cab behind the blinker handled in the pic above, you can see a switch with a blue LED light on.  That is the fuel pump and when on, the pump adds additional diesel from my new tank into the truck.  As an added safety feature, I wired it from an uplifter switch (another switch on the truck) so really, both switches have to be on.  Most Ford trucks have 4 "anything" switches.  I have 3 extra so the built in feature will hopefully help keep accidental pumping.  The LED is also very bright so that helps as well.

That's it.  Install complete.