The Mansfield genuine 2206 fill valve is designed to fit Mansfield tank models, 102, 106, 108, 112, 172, 173, 174, 185, 187, 188, 195, 386, 387, 705, 708, 722, 1386, 3106, 3108, 3121, 3122, 3125, 3147, 3148, 3173, 3174, 3185, 3195, 3386, 3816, 3916, 3987, 2987, 3165, 377, 376, and 2916. This fill valve is easily identified by the small circular vent assembly at the top of the fill valve. This valve come complete with the replinish tube, nut to secure the valve to the tank, and the seal. You can also adjust the height of the tower, and the height of the float itself. When installing a fill valve make sure to flush the stop out. To do this you would disconnect the supply line from the old valve, and place the end of the supply line into an empty bucket. You will then turn the water on at the valve, and let it run for a few seconds and then shut the water off. You will need to repeat this process at least 2 to 3 times to insure there is no debris that will flow into the new valve.