The function of a reverse osmosis (RO) centrifugal water pump is to supply pressure to the RO system so that it can filter water effectively. The pump works by forcing water through a semi-permeable membrane to remove contaminants, such as dissolved solids, minerals, and organic matter. The centrifugal water pump is used to increase the water pressure in the system to ensure that water is pushed through the membrane at a high enough rate to achieve the desired level of filtration. The pump helps maintain consistent water flow and reduces the risk of clogging in the membrane, improving the overall efficiency of the RO system.