Plumbing an auxiliary transfer tank for gravity feed

[AddictedOffroad]

I just picked up a 100 gallon transfer tank yesterday. I plan to plumb it into my front tank. I will not be using any offroad diesel fuel. Just normal diesel for hauling trips.

I am looking for ideas to either gravity feed with an electric check valve or use a 12v pump.

What have you guys done and how did you plumb it. I was looking at the RDS kit, but it doesn't look like its going to work for the OBS trucks like the 99+models.

[bck4more]

What i did on mine was just drill hole in the bed and put a tee in the filler tube had a shut off coming outta aux tank.

[jesilvas]

I've used a pump two diff ways.
1. Normal hose and auto shut off nozzle.
2. Tee post filter down into tank vent line. So I could have just flipped in cab switch to on, ran pump, and filled tank. However, once full, the gas cap couldn't hold pressure so it leaked. Never did that again. I just run my 300-350 miles, get out, and fill it up real quick, then keep going. Gives you a chance to stretch, check tires, etc.

[van-boy]

for what you need, i would do what bck4more did. the pump, hose and nozel up here would cost you an additional 400 plus tax.

bailey

[AddictedOffroad]

Originally Posted by van-boy

for what you need, i would do what bck4more did. the pump, hose and nozel up here would cost you an additional 400 plus tax.

bailey

I would really like to be able to fill it on the move without getting out to open/close the pet****/valve.

The RDS kit has a check valve and it automatically keeps the tank full. So, no stopping every 200mi to refill it manually. Once the check valve closes, it stops feeding the tank.

But, from what I have read, the RDS kit won't work with the OBS truck since the vent is inside the filler neck on our trucks. And, much to my surprise I have never had filling issues with this truck to require the "vent mod" that guys do. The other option would be to plumb it into the return line. Not sure if it will work though.

[AddictedOffroad]

So, I just ordered this:

3/8" Electric Solenoid Valve 12-VDC Air, Gas, Fuel Normally Closed: Amazon.com: Industrial & Scientific

3/8" Electric Solenoid Valve 12-VDC Air, Gas, Fuel Normally Closed: Amazon.com: Industrial & Scientific

I should be able to just use a toggle switch on the dash. With the ignition off it will remain closed. I do plan to also have a shut off ball valve at the tank as well just in case. This should allow me to just T into the filler neck to gravity feed the tank.