PRESSURING DEVICE AND SYSTEM CAPABLE OF SAVING WATER BY ADDING EXPANSION FORCE OF COMPRESSED AIR TO WATER SO AS TO AMPLIFY WATER WORKING FORCE

PROBLEM TO BE SOLVED: To provide a supply water pressurizing water faucet capable of switching between water supplying and pressurizing mode and water supply mode by the opening and closing of a handle lever. SOLUTION: A mechanism capable of being switched easily according to a purpose of use is added to a water supplying and pressurizing faucet for water saving system so as to be used also as a regular supply water faucet. A rotating motion from a handle lever 18 is added to the faucet, a shaft 23 is moved up and down so as to open and close the water supply port 35-1. A cylinder 28 is fixed to a casing 45 of a faucet main body, a projected part is provided on the outer surface of the shaft, and a recessed groove is provided in the inner surface of the cylinder. When the handle lever is rotated, a shaft main body is moved up and down while rotating in both clockwise and counterclockwise directions. When the handle lever 18 is rotated counterclockwise, the water supply port is opened and closed in up and down movement in connection with the movement of the shaft, and air supply is started and stopped in vertical rotating motion. Though, when the handle lever is rotated clockwise, the supply water port is opened and closed by the vertical motion of the shaft, an air supply function is not provided.