Connecting an in bed tank

[Dreamer]

I've got to hook up my in bed tank and am not sure if I can hook up to the vent line or T into the main filler tube. If I hook to the vent, how will it fill up if it can't vent ? I'm pumping from the tank with a 75 gal/hour fuel pump. Gravity feed not an option. Am I over thinking this issue ?

 

[mfurrh55]

I'm tied in at the vent tube and i pump 40 gal. , no problems if i cut the switch off when the guage reads full,if you don't cut the pump off it will blow fuel out the fuel cap, ask me how i know... ... , Monte

 

[jelag]

you need to consider a 1/2 lb back check valve so that the tank doesn't gravity flow into the factory tank... I used a simple brass 1/4 pipe thread... . to hose... punched a hole in the filler tube and epoxyed it in place... of course it was out of the truck... . threaded the pipe thread end into the filler tube...

I put a switch on the dash to turn it on and off... . my pump... maybe 1 gal per minute after it goes through a filter works great for me... .

 

[Hoefler]

I brazed a coupler on both the fill tube and vent tube. Then threaded in the correct fittings to make my connections.

 

[CKelley1]

why is gravity feed not an option. if you sometimes remove the tank consider using a hydraulic quick coupler. you never have to worry about the pump, no valving needed and the truck tank is always full

 

[puller]

I tried the gravity feed and it did not work like I thought it should. Overflowed one time and that is when I tied into the main tank vent line and used a 12 volt pump and a switch that is operated by a off/on switch on the dash that also activates a fuel level gauge in the aux tank. So far this arrangement has worked very well for me,



puller

 

[Gonzo 1066]

Just T into the vent line that way the vent still works and the fuel runs into the tank. . Easy and has worked on 5 of my trucks.

 

[B.G. Smith]

I brazed a coupler on both the fill tube and vent tube. Then threaded in the correct fittings to make my connections.

Same here, that's the only way to go as far as I am concerned, if the tank fills before I remember to cut the pump off it just recirculates back up to the reserve tank. I used a bathroom vent fan timer switch so If I forget to turn the pump off it shuts down when it times out. I have had the same system on three different trucks and only leak i ever had was on the 99 when I first installed the system the in-tank fuel module nut was not tight and it leaked a few drops. bg

 

[Dreamer]

why is gravity feed not an option. if you sometimes remove the tank consider using a hydraulic quick coupler. you never have to worry about the pump, no valving needed and the truck tank is always full

Gravity feed is not an option because I don't want to have to weld a drain in the bottom of the tank. I don't need to remove the tank from the truck as I don't haul stuff.

 

[EricBu12]

Dreamer,



I have 2 plastic tanks that I use to fill my Aero 60 gal replacement. . there is a vent hose on top. . I use gravity by siphon. . I got a bulb hand pump to start it then it does the rest. I have as you see in the pic, a 2 valve system so I only work on 1 tank at a time. . These are Marine plastic tanks that I can strap down and take out with just a short hose remaining in the bed when out. . The fill caps and vents are replaced with items that makes it not leak as you see in 1 pic. . Works pretty good. . I have a 60 underneath and the 2 tanks are 40 total. (17 & 23)

 

[Powder Extreme]

Those of you filling through the vent line:

If you start with both tanks full, drain the main, fill from the the aux, and drain the main again, then immediately try to fuel the main tank at a truck stop, do you have one heck of a time filling the main tank without the fuel spitting back at you and the nozzle constantly shutting off?

I had that problem in my GM, which was plumbed into the filler neck, but unfortunately directly across from the vent line so most of the fuel being pumped in went into the vent line. It would get to the point that unless I let the truck sit overnight after draining the main tank, I would only fill the aux tank and basically just run off of it.

I'm assuming the vent line would fill with fuel and not allow the tank to vent, but what is odd is even after a few hundred miles of driving, the vent line must have still been full. Yet sitting overnight it would drain out. I don't know if there was some kind of a check valve or what, never could figure it out.

 

[BIGNASTY]

Im tied into the Main tank fill line from the aux tank output and then a return line from the vent line back to the aux tank, with a 12v timer and carter fuel pump. I wait to make a fuel transfer until the Main tanks reads 1/4 just a one cycle of the 15 min. timer fills the Main tank darn near full. If it over fills it just keeps recycling the fuel from one tank to the other until it times out.

I thought about gravity feed also, don't know if its a federal thing but IT'S NOT legal to do that in case the truck flips there would be no shut off, DONT KNOW IF OR HOW THEY MIGHT CHECK but who would have thought that the Black box's would be a problems for the consumer until the EPA got a wild hair!!!

JMO
BIG

 

[BLNRAY]

2004 i installed a 74 gal. transferflow tank,not an inexpensive system granted,but 350,000 mi on the tank,who knows how many gallons of fuel been through it,one sending unit replaced no other problems. if your gravity feed or pump switched from the cab system dumps fuel on someones parking lot and it gets reported,it could get expensive quick. especially if the epa gets involved

 

[BIGNASTY]

2004 i installed a 74 gal. transferflow tank,not an inexpensive system granted,but 350,000 mi on the tank,who knows how many gallons of fuel been through it,one sending unit replaced no other problems. if your gravity feed or pump switched from the cab system dumps fuel on someones parking lot and it gets reported,it could get expensive quick. especially if the epa gets involved

Anything over 10 gal on the ground is a hazmat spill in Calif. , I don't know about any of the more realistic states.

 

[S.Morris]

My carter pump would gravity feed through pump even if it was turned off. I installed a 12V shutoff that is power to open when pump is turned on and closes when pump power is cut. Now its a lot easier to keep track of how much fuel is in aux .

 

[RikDavis]

Same here, that's the only way to go as far as I am concerned, if the tank fills before I remember to cut the pump off it just recirculates back up to the reserve tank. I used a bathroom vent fan timer switch so If I forget to turn the pump off it shuts down when it times out. I have had the same system on three different trucks and only leak i ever had was on the 99 when I first installed the system the in-tank fuel module nut was not tight and it leaked a few drops. bg

I have done the same thing with the bathroom timer and a slow pump. I have not tied into the main tank yet, I am confused about the references to tying into the vent line. Is this referencing the 1/2 inch metal line that vents air around the filler or the small diameter hose that appears to be tied of above fuel tank height and I assume has the rollover valve on it?? Or are people using both of these on different installations?

 

[mpaulson]

I'm planning on just tiring into the vent line and I have a Holley pump that I'm going to use to do the transferring. after reading through this, I will be putting a 5 psi check valve in to prevent siphoning. but now I'm concerned with another thing, I have a 2014 and I have bought the Geno's filler plug which is solid rubber, no venting, if I pump a high volume of fuel in, where is the air going to escape?? Am I going to inflate the stock tank? I had read somewhere in the past that the filler neck on these new trucks have a overfill drain that dumps the fuel out inside the fender if you top up the tank while filling it normally at the pump, which I would think would allow air to escape as well in the transfer process. has anyone done a rule transfer system with a pump and Geno's plug in the filler neck?
I definitely need the filler neck plug. I just picked up the new truck on Monday and when i got it home, there was already a little snow in the filler spout!!!!! that was after only 20 km's of driving in the snow. so much for the sealed filler door!

 

[B.G. Smith]

I have done the same thing with the bathroom timer and a slow pump. I have not tied into the main tank yet, I am confused about the references to tying into the vent line. Is this referencing the 1/2 inch metal line that vents air around the filler or the small diameter hose that appears to be tied of above fuel tank height and I assume has the rollover valve on it?? Or are people using both of these on different installations?

I tied into the filler neck and the vent line, fuel from my pump goes to the filler neck and the tie in to the vent goes back up into my tank in the bed. If I remember correctly there are only about three screws holding the filler pipe/vent line in the fender, both lines have a rubber hose section, I removed the assembly and brazed half of a 1/4" threaded pipe coupling into each, bought some hose barbs and used 3/8" fuel hose to plumb up. I read where several people just run one line from the reserve tank to the main tank but never have been able to understand how the main tank vents when adding fuel from reserve? Main tank is vented to prevent vacuum when using fuel out of it but I understand those little lines have check valves in them to prevent fuel spillage when filling the tank. On my setup the air froom main tank is displaced up to the reserve as I pump fuel from the reserve. Hope this helps. bg

 

[Shadrach]

I gravity feed mine, with a manual ball valve on it. I tried an electric solenoid so I could control it from the cab but it failed so I removed it. I would like to still have one but haven't found a good quality one yet. Anyone know of one? David

 

[Hoefler]

I'm planning on just tiring into the vent line and I have a Holley pump that I'm going to use to do the transferring. after reading through this, I will be putting a 5 psi check valve in to prevent siphoning. but now I'm concerned with another thing, I have a 2014 and I have bought the Geno's filler plug which is solid rubber, no venting, if I pump a high volume of fuel in, where is the air going to escape?? Am I going to inflate the stock tank? I had read somewhere in the past that the filler neck on these new trucks have a overfill drain that dumps the fuel out inside the fender if you top up the tank while filling it normally at the pump, which I would think would allow air to escape as well in the transfer process. has anyone done a rule transfer system with a pump and Geno's plug in the filler neck?
I definitely need the filler neck plug. I just picked up the new truck on Monday and when i got it home, there was already a little snow in the filler spout!!!!! that was after only 20 km's of driving in the snow. so much for the sealed filler door!

This is what I did on mine. I used a draw straw in my aux tank so it draws a 1/4" off the bottom. I have a clear fuel strainer on both the feed line and the return line. I can see them in my rear view mirror. I can monitor fuel flow and when the main tank is full the return strainer is full. when the feed strainer is empty, the aux is empty.