Description A spring loaded pressure relief vent made of brass and contains a brass screen and gasket to insure a vapor resistant seal. Air flow at 2.5 psi with screen is 17,707 SCFH, and 19,218 SCFH without screen. Recommended Accessories: AST Overfill Prevention Valve AST Spill Containment Box AST Sight Gauge PEI Free Flow Vents
