Fire-fighting water supply system is divided into two types: outdoor fire-fighting water supply and indoor fire-fighting water supply. Its main functional units include fire-fighting water sources, fire-fighting pumps, water supply pipe networks, pipe network control equipment, fire hydrants, and pump couplings.
Fire-fighting water sources can use municipal water supply networks, fire-fighting pools, natural water sources, and reclaimed water. The fire pump should adopt a self-priming suction pump. When the fire pump draws water directly from the municipal pipe network, a backflow preventer with an air blocking function should be installed on the fire pump's outlet pipe.
Fire-fighting water sources generally use the municipal water supply network, and the pipelines use pressure water pipelines. The valves are mostly gate valves, globe valves, butterfly valves, check valves, filters, safety valves, etc., and backflow preventers are also used. The most common are flange and grooved pipe connections. When the floor is higher, a high-level fire water tank needs to be set up; when the potential fire-fighting water is large and the outlet requires high pressure, the water supply needs to be partitioned.
