A valved aerosol Tee adapter assembly comprises a housing member having an upper section with a first interior passageway, a spring chamber between the first passageway and the inner wall of said upper section and a valve seat formed along the upper edge of said upper section, and a lower section having a second passageway contiguous with the first passageway, a compressible spring positioned in the chamber; and a valve reciprocally movable in the housing comprising a valve actuator slidably received in the second passageway having an upper surface for engaging the compressible spring, and a valve member secured to the valve actuator.