Check valve for gas tank overflow

OK I've been to Auto Zone, O'Reilly's, Napa and several locals looking for a check valve.
Most of them wouldn't know what a check valve was if it bit them in the A$$.
And the one that did only listed one with three barbs that were about 1/16 Dia.

Anyone know a source and maybe a part #???

Thanks
Jay

I use a check valve from dirt bike gas tank any type there made for the gas and work perfect just go any motorcycle shop and they will have it they will know what your talking about .

Advance Auto or Auto Zone " Help Rack" has them

Auto Zone was the first place I tried....looked on the Help rack first then asked the guy behind the counter, he looked at me like I was some sort of moron. Said he's never heard of such a thing.

I'll try the motorcycle shop

Thanks Guy's
Jay

I am often stunned at the lack of knowledge of the person behind the counter of an auto parts store...

Some PCV valves have a ball-check in them. I usually find these in the generic "help" section of an auto parts store. These work OK for a vapor system as they are designed to let vapor flow but the ball rolls closed when liquid hits it. Emissions equipment especially on carbureted cars have check valves. Jaguar used a check-valve inside their fuel lines near the tanks on both sides of a 76 Jaguar. That was the true liquid type check valve where liquid flows one way only, can't flow backward.

Also, Summit Racing sells a nice selection of check valves starting around $25 and going up to about $175ish. Some very nice ones in the $40 range.

angela

The topic here is "Check valve for gas tank overflow" - got to ask: where is this installed specifically?
SS

In the breather tube (overflow line) from the gas tank to stop gas from leaking out in left hand turns just after you've filled the tank.

I think the check valve frequently used is sold as a vacuum check valve.

OK, so now I've been to every car part store and every motorcycle shop in a 50 mile radius...No One has one. They act like this is some kind of antique part. I've asked for a One-way valve, a check valve and a Vacume check valve I've even explaned how one works in case they have a name for it that i don't know about.

One motorcylce shop even told me motorcyles haven't used those in more than 20 years....Yeah Right!

I guess you just can't get one in central Texas.

I will be making a couple of phone calls to my car and motorcycle buddies in California.

Jay

Jay send me your address I'll send you one Roland

Roland,

Thanks!
Sent you an E-mail

Jay

Usually, whenever I wander through a junk yard (Oh, I mean "Automotive Recycling Facility") I look into a few Fords and grab a few vacuum check valves here and there. They're about the diameter of a quarter, black on one side and white on the other, 3/16" barbed fittings and seem to flow enough air in one direction to satisfy a VW engine/gastank need.

I'm sure other makers (GM, Honda, Toyota, Chrysler, etc) had them, too, but I knew which Ford ones worked and just grabbed those.

Thanks to Roland, though, for making Jay's search easier!

Worked for me! Reroute your overflow line to highest possible position on cowl then down the side of the tank and out.Tom

Actually, these vents are not for overflow. They are to let air into the tank to replace the gas sucked out.

The beauty is they are one-way.....in and not out

Routing the end of the overflow line to under the passenger rocker panel helped more than the check valve.

I'm with Cole on this one. I run an open hose direct from tank neck to BELOW the pan. I may be losing s few drops of gas when cornering hard on a full tank - but I no longer get any gas fumes.