Sump vent question

[scottastew]

Nate,
I installed my vent line from the Edelbrock sump back into the fill hose of one of my tanks. In that same line, close to the fuel filler hose, I also put in a one way check valve to allow gas & vapor into the fuel tank but not the other way (not that it would). Just want to make sure that is ok and there isn't a need for 2-way venting.
Thanks.

[Nate S]

What's the crack pressure of your check valve? I'm not sure a check valve is really necessary and you definitely wouldn't want to induce back pressure on the vent with too strong of a check valve. Ideally the tank should have little to no pressure and the "wet" vent from the sump can vent to the tank without restriction.