A pre filter cartridge is the initial stage in most water purifiers, especially RO systems, designed to trap large particles like sand, dust, rust, and sediment. By filtering out these impurities early, it protects the inner filters and the RO membrane from damage or clogging, ensuring longer life and better performance of the entire system. Pre filter cartridges are usually made of spun polypropylene and are easy to install and replace. Regular replacement—every 3 to 6 months—is essential for maintaining high water flow and consistent purification. It’s an affordable yet vital part of any water filtration setup.

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