Sloan Genuine OEM 5301189 A-156-AA Regal Flushometer Diaphragm Repair Kit Segment Quiet Flush Valve Replacement Part. This Sloan A-156-AA Diaphragm Repair Kit fits all Sloan Regal flushometers. Due to the repeated movement of the diaphragm required for every flush cycle, the diaphragm is one of the most commonly replaced components in a flushometer. In addition to the diaphragm this kit also includes the other parts necessary to provide a quick “refresh” of your flushometer with the parts that are most prone to wear.