Before installing the valves, clean the water pipe thoroughly to avoid dirt and deposits. & ft { Install spout (1) O-ring (2), Secure with washer and nut (3). Note: If sink is uneven, use silicone under the gasket. Remove the brass lock nut from the thread rod counter-clockworks, remove the washer and washer. 1.Make sure attach the gasket to the base of hot (1) and cold (2) end valves. 2.Slide hot (1) and cold (2) end valves with flexible hoses (3) through sink. 3.