BCBHG Variable Frequency Constant Pressure Water Supply Equipment is a new electromechanical integrated device combining frequency conversion, PLC tech and pump units. It forms a closed-loop system with imported components, auto-adjusting pump speed/operation based on pipe network pressure to maintain constant pressure. It replaces traditional water supply modes, features remarkable energy-saving effect, and can run 1-4 pumps in parallel with a booster unit for higher efficiency.