The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Where to run gas tank vent line with tank moved to rear of truck?

**John Fabris** · 01-11-2009, 09:31 PM

With my set up, I made a hole 2 inches down from the top of the filler tube, and then welded an elbow fitting onto it, and ran the air vent hose to that. With a solid marine style cap, I have a closed system with the air vent only for filling. (The end of a gas pump tupe is around 3-4 inches long. That way out going air is exiting ubove the incoming air. Easy fill.

I added a vacumn check ball valve (from a motorcycle shop), onto top of tank and that relieves any vacumn created during fuel consumption.

As for your having to unplug the second hose, make me think that the first vent hose to the filler next is plugged...
How is your filler tube installed?

01-11-2009, 09:31 PM	#2
John Fabris TOTY 2006 Join Date: Dec 1999 Location: Magalia CA USA Posts: 2,270	Re: Where to run gas tank vent line with tank moved to rear of truck? With my set up, I made a hole 2 inches down from the top of the filler tube, and then welded an elbow fitting onto it, and ran the air vent hose to that. With a solid marine style cap, I have a closed system with the air vent only for filling. (The end of a gas pump tupe is around 3-4 inches long. That way out going air is exiting ubove the incoming air. Easy fill. I added a vacumn check ball valve (from a motorcycle shop), onto top of tank and that relieves any vacumn created during fuel consumption. As for your having to unplug the second hose, make me think that the first vent hose to the filler next is plugged... How is your filler tube installed? __________________ John Fabris 67 C10 SWB Last edited by John Fabris; 01-11-2009 at 09:34 PM.