Liquid vapor separator drain valve

A liquid vapor separator drain valve assembly for a fuel tank of a vehicle, comprising:

• a liquid vapor separator drain valve adapted to be positioned in the fuel tank, the liquid vapor separator drain valve including:
• an outer housing defining upper and lower chambers separated by a divider member having a vent passage;
• an upper housing coupled to the outer housing and having a body positioned in the upper chamber thereby partitioning the upper chamber into an outer chamber and an inner chamber, the upper housing defining an upper port adapted to be in communication with a carbon canister, the outer housing defining an external port in communication with the outer chamber and adapted to be in communication with a fill limit vapor valve;
• and
• a lower valve movably positioned in the lower chamber and an upper valve movably positioned in the inner chamber, wherein the upper and lower chambers and the upper and lower valves are positioned in a vertically stacked, concentric arrangement;
• wherein the lower valve is operable to vent fuel vapor from the fuel tank to the upper chamber in a rest position and seal off the vent passage when liquid fuel reaches a lower predetermined level, and the upper valve is operable to vent fuel vapor to the upper port i) from the vent passage and ii) from the external port when liquid fuel is above or below the lower predetermined level, and to seal off the upper port when liquid fuel is above an upper predetermined level greater than the lower predetermined level.