As a lightweight water tank fire truck, its core function is to extinguish initial fires. It is equipped with a CB10/20 low-pressure fire pump, with a rated flow rate of 20L/s, a pressure of 1.0MPa, a water intake time of ≤ 35s, and a suction depth of ≥ 7m. It can quickly complete water suction and pressurization. Relying on the roof PS20 fire monitor (range ≥ 45m) and side water outlet, it can achieve long-distance and large-scale water fire extinguishing, effectively suppress solid material fires (Class A fires), adapt to the initial fire disposal of residential buildings, shops, enterprise parks and other scenes, and prevent the spread and expansion of the fire in the first time. At the same time, it can be connected to an external fire hose, and precise firefighting can be achieved at close range through water guns, flexibly responding to complex fire environments.