Abstract: A pre-rinse unit incorporates a normally closed water shutoff valve connected to the lower end of a vertical riser pipe carrying a source of water. An outer tube is rotatably and longitudinally slidable on the riser pipe. A pair of rotatable arms are mounted for rotation at one end to the upper end of the vertical riser pipe above the outer tube for rotation about a horizontal axis and the arms carry cams contacting a cam follower ring whose lower surface abuts the outer tube. A concentric coil spring surrounding the vertical riser pipe and interiorly of the hollow tube, abuts a lower collar fixed to the riser pipe, interiorly of the tube, at its lower end and its upper end abuts the cam follower ring. Stop means carried by the riser pipe limits pivoting of the arms.