Gas charged sprayer

In combination with a sprayer tank having a top wall and a valve-controlled outlet conduit communicating with the interior of the tank adjacent the bottom thereof;

• a gas pressurization adapter for said tank comprising:
• a. a connector fitting carried in the top wall of said tank and arranged to sealingly receive and support an inverted, liquid propellant supply cartridge above the top wall of said tank, said fitting having a propellant-conducting passage extending therethrough;
• and
• b. an elongated, propellant-receiving trap having an upper end communicating with the propellant-conducting passage of said fitting and a closed lower end portion extending downwardly into said tank for direct heat exchange contact with a spray liquid contained in said tank, said trap defining an elongated vaporization chamber into which a pressurized liquid propellant may be introduced by way of said fitting, and said trap being provided toward the upper end thereof with an outlet opening through which vaporized propellant may flow into the upper region of said tank.