For a few years I have wanted to install a transfer fuel tank. I searched online and found a shop in Texas, www.attatank.com , that builds their own tanks in shop and will modify the tank fills, the pump bungs and in my case added a 1.5" threaded bung for a mechanical fuel tank gauge. Great guy to work with. I ended up with a 45 gallon tank. I bought a 20GPM Tuthill, 12 volt transfer pump with a 12 foot X 1" hose and I added an automatic shut off nozzle instead of the small manual nozzle. I also added a 2" pipe threaded fill neck instead of the automotive style that used a cheesy plastic automotive style cap. I bought an aluminum 2" locking cap and ATTA added a bigger tank vent. I mounted a keyed HELLA battery cut off switch. I was able to tie into the #10 gauge wire I have running from the trucks batteries to the back of the truck that feeds my TIPM saver. I had the tank shop not weld on the mounting tabs so I could position the tank where I wanted it. A friend of mine does TIG welding so he welded the tabs on where I wanted. I made up 3 nut plates from 1" x 3/16 strap steel and welded a 7/16 nut on it. I put some 3M double sided thin foam tape on the tabs then cleaned the under side of the truck bed nd stuck the nut plates on. They aren't going anywhere. I used button top, allen head, stainless steel bolts to tie the tank to the truck bed. My goal is to be able to remove the tank without having to crawl under the truck. I ended up mounting the tank to the passenger side of the truck bed so I would have hose storage on the drivers side of the bed. Tuthill has hoses as long as 20ft. Now I can fuel my Kubota and my diesel back up generator. I added the Cummins "C" to the pumps electrical cover. Found several of those on the valve covers of some old UPS trucks....They kinda just fell off of the engines!
Here are a few pics.

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