External system is rated at 400 GPM with our standard fuel nozzles. Our external line system fits into all standard 2” NPT openings. • Patented design Patent #US10597284B2 reduces fuel foaming and increases flow due to an unrestricted “straight through” flow path. • Factory tested prior to shipping. • Integrated roll over spill protection. • Optional rotatable vent top. • The FloMAX external line system can flow over 400 GPM, higher flow rates than all other competitors. • All stainless steel and aircraft grade aluminum construction means they are built to last. • Compatible with all tank types (plastic & steel).