Small Trailer Fuel Tanks Can Now Use Gravity Feeds Safely
Published Date: 5/30/2025
Proposed Rule
Summary
The FMCSA wants to allow small auxiliary fuel tanks (under 5 gallons) on trailers to use gravity or siphon feeds, but only when the vehicle isn’t moving. This change helps truck trailer makers by easing a rule without risking safety. If approved, it’ll make life easier for certain truck operators with no extra costs or delays.
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
Allow small trailer fuel tanks when parked
The FMCSA proposes allowing auxiliary fuel tanks under 5 gallons mounted on the trailer chassis frame or trailer bed to use gravity or siphon feeds, but only for purposes other than operating the motor vehicle and only when the vehicle is not in motion. This change responds to a petition from the Truck Trailer Manufacturers Association and would relieve a regulatory requirement without impacting safety, making life easier for certain truck operators with no extra costs or delays.
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Key Dates
Department and Agencies
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