This Pool Cartridge Filter and Pump work together to circulate and clean pool water, keeping it clear and safe for swimming. The pump pulls water from the pool through the skimmer and main drain, creating continuous circulation throughout the plumbing system. As water is moved through the system, it is pushed into the cartridge filter. The cartridge filter removes dirt, debris, and fine particles from the water by trapping them in a pleated filter element. Clean, filtered water then flows back into the pool through the return lines.