Main Tank or Aux. Tank. Which to fill first on Gravity Feed?

[mdkaggie]

I just bought a RDS Aux. Tank tool box combo and really like it. I just installed it and it looks great. Now it is time to fill it up. Do I fill the main tank first then fill the aux. tank? Or do I just fill the aux. tank and let it gravity feed to the main? I have no clue which is right? Thanks for your time and help.

Mike

[chillls]

gravity feed? how are you going to keep it from over filling the main tank?

[chillls]

i have my aux tank with a napa pump & a 12 volt shut off solenoid so when i shut the pump off the solenoid shuts off the flow of fuel as well.
& how i came to this is becuase i didnt have the shut off solenoid on at first & i had a nice BIG puddle under my truck

[paulgl26]

just get a filter in beetweek the aux and the regular tank and fill only the aux
that way you filter your fuel before it goes in the main tank
i use this
Diesel Install Kit for Auxiliary Diesel Fuel Tank — Fits all Ford, Dodge and 2011 Chevrolet and GMC Trucks, Model# 011025 | Auxiliary-Transfer Tank Accessories | Northern Tool + Equipment

[mdkaggie]

I have the northern tool kit that your mentioned. I put a wix inline fuel filter between the aux. tank and the main fill tube. I was just curious, once the main tank is full and you have the aux. tank full. does the fuel come out the main fuel line gas cap? Will it over flow? Do you leave your ball valve open at all times?

[mdkaggie]

What Napa pump did you buy and where did you get the 12 volt shut off solenoid? I am new to all of this so I am trying to understand it. Where did you hook up to get 12v power? Thanks for your help on this.

[paulgl26]

that kit has a ball check valve that will stop the flow once the main tank is full, i never turn the valve off
i have been using this setup for 4 years with no leaks
do not overfill the aux in the summer when is hot(don't ask how i know that lol)

[chillls]

Originally Posted by mdkaggie

What Napa pump did you buy and where did you get the 12 volt shut off solenoid? I am new to all of this so I am trying to understand it. Where did you hook up to get 12v power? Thanks for your help on this.

i dont remember the part # for the pump but it was like $65-$75 & the 12 volt shut off solenoid i just got off of the internet & that was like $30
i got a pic of my set up
the pic is before the shut off valve
i do have a ball valve up at the tank though

[mdkaggie]

Thank You for the pic. That helps out a ton. I am going to try to get this set up tomorrow.

[mdkaggie]

Where did you run your power wire to and tie in?