供应The water filter system is considered the heart of every water filtration system, determining the quality of the output water. Karofi water filtration systems typically he 4-10 filter cartridges, each with a separate role. The first four filters, especially the RO membrane, are present in all water filter machines. After passing through the water filtration system, the water will he a clean, pure quality, free from harmful substances, and safe to use.