Section 1090.1550 - Requirements for gasoline dispensing nozzles used with motor vehiclesThe following requirements apply for any nozzle installation used for dispensing gasoline into motor vehicles:
(a) Nozzles must meet the following hardware specifications:(1) The outside diameter of the terminal end must not be greater than 21.3 mm.(2) The terminal end must have a straight section of at least 63 mm.(3) The retaining spring must terminate at least 76 mm from the terminal end.(b) The dispensing flow rate must not exceed a maximum value of 10 gallons per minute. The flow rate may be controlled through any means in the pump/dispenser system, as long as it does not exceed the specified maximum value. 88 FR 4718 , Jan. 24, 2023 85 FR 78469 , 12/4/2020; 88 FR 4718 , 3/27/2023