BPD pipe network layers of water supply equipment mainly consists of a compensation water tank, water pumps, pressure-increasing devices, switching devices, basic accessories and an intelligent control system. In the operation of water supply equipment, the water supply method of superimposing pressure on the pipeline network is adopted. Through the control mode of the equipment, the municipal water supply and the water tank supply are combined to eliminate the suction head generated by the water pump during operation and fully utilize the original pressure of the municipal pipeline network. It realizes the energy-saving and pollution-free water supply mode of supplementing as much as the pressure difference. The main features of the equipment are protecting the pipeline network pressure, stabilizing the municipal water supply, pressure difference adjustment, conversion, energy saving, safety, environmental protection, high-quality water supply (solving the problem of secondary water supply pollution) and low noise.