In-Line Fuel Overflow ProtectorThe fuel vent line surge protector helps avoid refueling spills because the surge-free line causes automatic fuel nozzles to shut off as the tank fills.With non-automatic nozzles, the surge protector causes a gurgling sound to indicate that the tank is full.Incorporates a ball-style check valve with internal baffling.Features: Meets ABYC Standard H-24 Install in-line with traditional tank vent systems that use standard 5/8" ID vent hose Compact size and operates in any orientation within 45Adeg of vertical Withstands oil, gas, alcohol-blended fuels Includes 2 hose clamps for installation in the vent hose WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.