Fuel-Lock vent with trap to prevent water to flow back

Fuel-Lock lets air but not fuel out. Fuel is locked inside by a trap system that removes marine pollution and streaks on the side.
An internal bulkhead device also avoids water to reach the tank through the vent. Polished AISI 316 stainless steel external element, hydrocarbon-resistant copolymer polypropylene internal element.
External part in polished AISI 316 stainless steel.
Internal device in polypropylene copolymer resistant to hydrocarbons.