Wet Riser System is a typical installation in a high-rise building. It is used to supply water from the wet riser water tank, through wet riser pipes, distributed to each floor, and ending at the
canvas hoses and hose reels.The pipes supplying water to the hoses are pressurized all the time. Three pumps supply the water from the tank to the hoses. The pumps are the duty pump, the stand-by
pump, and the jockey pump.