pwrtripls1

How well does the gravity feed work? All I do is T into the vent line and slap on the good old locking fuel cap right? I got a 50 gallon I want to get installed in my bed this weekend because I have some long trips coming up. Plus the 3.86 at wal-mart here sure beats the 4.07 I see at most other stations lately and I dont want to have to fill up with expencive stuff to get back home.

Thanks.

rich

yea but you need something to stop the flow because it will overflow the tank already been there

pwrtripls1

I thought you didnt have to worry about overflow because the gas cap is supposed to hold back the pressure and not let it leak out.

scootertrash35

i put a valve on mine that i can open while driving(about $10),because it has overflowed

rich

nope it leaks out

rockcrawler304

What type of valve did you get? I am looking at putting a 100gal tank in very soon.

TJAR66

Isn't gravity feed illegal. I don't know I thought I heard it somewhere when I wanted to do the same thing

pwrtripls1

I go by common sense, screw the law. If I can make it work for me I ain't listening to someone who tells me I cant do it. But thats just me and I'll never just go with the system cuz the system sucks.

TRASHMAN

can't ya just use an old manual valve ? i did worked for me just gotta watch your level . brass 1/4 pipe valve from the hard ware store

Tee

I had an aux tank in one of my older trucks. Just a 1/4" ball valve at the aux tank and a hose down to the filler neck. Pulled filler neck and drilled tapped and soldered a barb fitting onto the metal filler neck. It would overflow if I didn't shut off the valve...

Agades

I would also like to know the answer to this
ive done many of these set ups for people in the past. ummm , I mean , I know a guy who makes these

Agades

step1: remove metal filler neck
step2: reduce 2" filler hose to something smaller and extend/ hook up to drain in aux tank ( a ball valve would be a good idea just in case of leaks)
step3: extend vent hose up into box and keep above aux tank and put some kind of filter on it to keep out dirt

simple and easy

your aux tank should also be vented with a roll over valve (at least attempt to be legal)

carl48

i had a small pump on my truck i just converted it to gravity feed i took a line out of the bottom of a 100 gallon transfer tank modified a napa 4309 base to accept a car quest 2 micron filter 86377 mounted it to a bed cross brace and teed into the filler neck hose no leaks and works perfect , i re read the law and it looks like if you connect the motor to the aux tank it is illegal but if you gravity feed the truck tank you are ok

kelley15

I have run a gravity feed tank in my last 2 trucks. Never has overflowed. I do have a 1/2 valve on it. When I get under half a tank I open the valve and let her flow. It stays full along time. I sure would hate to overflow any of that liquid GOLD.

Rick D

I gravity feed mine, valve stays open all the time, never overflowed or leaked.
I feed it directly into the filler line just bellow where my fass return is tied in.

Rick