Labels:text | screenshot | tool OCR: SECOND-STAGE REGULATOR WATER LEVER DIAPHRAGM AIR CHAMBER AIR INLET VALVE EXHAUST VALVE HOSE MOUTHPIECE TTO TANK THE SECOND-STAGE regulator with the water and is also connected adjusts the pressure of the air to to the air supply. Changes in water match that of the water outside. It does this by using a flexible pressure move the diaphragm rubber diaphragm that is in contact inward and outward, and this action opens and closes the air inlet valve.