Abstract: An apparatus for charging pressurized aerosol cans with liquid is provided having a base for providing mechanical stability, a can support assembly for supporting an aerosol can being filled with liquid, and a can charging assembly having a can receiving element and including a liquid reservoir having a tapered bottom in fluid communication with a pump rod receiving aperture for receiving a main piston pump rod. The main piston pump rod has a linearly elongated shaft terminating at its lower end in a radially expanded head and a sealing ring receiving slot into which a pliable sealing ring is recessed.