Adjustable length vent valve system for fuel tanks

A fuel level responsive vent valve assembly adaptable to a variety of different mounting requirements in vehicle fuel tanks, comprising:

• a standard valve body formed from a non-weldable, creep-resistant plastic, the standard valve body including a fuel-level responsive valve means and an exterior vent outlet portion;
• a weldable top cover formed separately from the standard valve body having a lower surface with a vent outlet interface portion for mating with the vent outlet on the standard valve body in a sealed connection, the lower surface of the top cover further including a standard preassembly interface comprising two longitudinal blind bores extending from the lower surface upwardly into the top cover, the weldable top cover being selected from a group consisting of a first top cover having a vent outlet interface portion of a first length, and a second top cover having a vent outlet interface portion of a second greater length;
• a plurality of separately formed longitudinal connector pins having a standard preassembly ends for insertion into the blind bores in the top cover such that the pins become longitudinally locked to the top cover, the connector pins further including standard assembly ends for insertion into mating channels formed in the standard valve body, the connector pins having a length such that the standard assembly ends of the pins protrude from a lower portion of the standard valve body;
• and
• longitudinal lock means for engaging the protruding assembly ends of the connector pins to longitudinally lock the standard valve body to the pins.