3/4" Pipe Thread, Single Use Fuel Hose Breakaway, Used In The Single Use Fuel Whip Hose & Breakaway System Which Installs Between The Fuel Tank/Supply & Fill Hose/Nozzle, If An Accidental Pull Away Occurs, The Fuel Saver Separates & Seals Off The Fuel Line On Both Sides Of The Breakaway, Helping To Prevent Major Fuel Spills, Equipment Damage, Costly Downtime & Fires, Hose Breakaway Requires 200 LB Of Pull Away Force To Separate, Universal Fuel Saver Will Operate On Gravity Flow & 12 Or 15V Systems.