A Pre-Filter Cartridge is the first stage of filtration in a water purifier, especially in RO systems. It is designed to remove larger particles like dust, sand, rust, and other sediments from the water before it enters the main purification process. By doing this, it protects and extends the life of the RO membrane and other internal filters. Pre-filter cartridges are typically made of polypropylene and are easy to replace. Regular replacement—every 3 to 6 months, depending on water quality—is essential to maintain the efficiency and durability of your water purifier.

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