A dental water supply apparatus for use with a dental hand piece, comprising: a hand piece control head adapted to be connectable to an air supply, an actuator, and a dental hand piece, the control head including an air actuated pilot valve, the pilot valve comprising: a body with a central lumen extending from a first end to an opposing second end, an air inlet at the first end, a water inlet disposed along the length of the central lumen, and a water outlet disposed at the second end; a valve assembly including a major piston actuatable by inlet air, a shaft extending from the major piston to at least one minor piston (35A, 35B) disposed between the water inlet and the water outlet; whereby the major piston is spring biased in a normally closed position wherein the minor piston prevents flow of water from the water inlet to the water outlet; and whereby inlet air actuation of the major piston causes it to be in an open position permitting flow of water from the water inlet to the water outlet; wherein: the lumen has a first chamber in which the major piston is movably disposed, a second chamber extending from the first chamber and being communicatively connected with the water inlet, and a third chamber extending from the second chamber to the water outlet; a spring is disposed in the first chamber behind the major piston; and there are two minor pistons (35A, 35B) disposed on the shaft, one disposed between the first and second chambers and the other disposed between the second and third chambers; and a removable water supply container, the container supplying water to the hand piece control head; wherein the pilot valve can be actuated via the actuator to allow water to flow from the removable water supply container to the dental hand piece; wherein the dental hand piece control head is directly connectable to and disconnectable from the water supply container. a hand piece control head adapted to be connectable to an air supply, an actuator, and a dental hand piece, the control head including an air actuated pilot valve, the pilot valve comprising: a body with a central lumen extending from a first end to an opposing second end, an air inlet at the first end, a water inlet disposed along the length of the central lumen, and a water outlet disposed at the second end; a valve assembly including a major piston actuatable by inlet air, a shaft extending from the major piston to at least one minor piston (35A, 35B) disposed between the water inlet and the water outlet; whereby the major piston is spring biased in a normally closed position wherein the minor piston prevents flow of water from the water inlet to the water outlet; and whereby inlet air actuation of the major piston causes it to be in an open position permitting flow of water from the water inlet to the water outlet; a body with a central lumen extending from a first end to an opposing second end, an air inlet at the first end, a water inlet disposed along the length of the central lumen, and a water outlet disposed at the second end; a valve assembly including a major piston actuatable by inlet air, a shaft extending from the major piston to at least one minor piston (35A, 35B) disposed between the water inlet and the water outlet; whereby the major piston is spring biased in a normally closed position wherein the minor piston prevents flow of water from the water inlet to the water outlet; and whereby inlet air actuation of the major piston causes it to be in an open position permitting flow of water from the water inlet to the water outlet; wherein: the lumen has a first chamber in which the major piston is movably disposed, a second chamber extending from the first chamber and being communicatively connected with the water inlet, and a third chamber extending from the second chamber to the water outlet; a spring is disposed in the first chamber behind the major piston; and there are two minor pistons (35A, 35B) disposed on the shaft, one disposed between the first and second chambers and the other disposed between the second and third chambers; and the lumen has a first chamber in which the major piston is movably disposed, a second chamber extending from the first chamber and being communicatively connected with the water inlet, and a third chamber extending from the second chamber to the water outlet; a spring is disposed in the first chamber behind the major piston; and there are two minor pistons (35A, 35B) disposed on the shaft, one disposed between the first and second chambers and the other disposed between the second and third chambers; and a removable water supply container, the container supplying water to the hand piece control head; wherein the pilot valve can be actuated via the actuator to allow water to flow from the removable water supply container to the dental hand piece; wherein the dental hand piece control head is directly connectable to and disconnectable from the water supply container.