The Fuelab 8AN high-flow one-way check valve is rated at 350 GPH and is sized for fuel systems using 8AN fittings. As a one-way check valve, it allows flow in a single direction to prevent backflow, and the 350 GPH specification indicates its flow capacity for use in compatible fuel delivery setups where an 8AN connection is required.
Fuelab 8AN High Flow One Way Check Valve - 350 GPH