Water purifiers rely on a variety of filter cartridges to ensure effective filtration. A single ultra-filtration (UF) membrane or reverse osmosis (RO) membrane alone isn't sufficient for comprehensive purification. Typically, household water purifiers use a combination of multiple filter stages. Below is an overview of commonly used filters beyond the UF and RO membranes, explained by experts at Hansdun.
1. PP Melt Blown Filter Cartridge
Material: Made from non-toxic, tasteless polypropylene particles.
Function: Removes sediments like mud, rust, colloids, and parasites. Often used as the first filtration stage.
Replacement Cycle: Every 2–4 months.
![PP Melt Blown Filter Cartridge]()
2. Yarn Filter Cartridge
Material: Wound yarn on a core, typically made of polypropylene or cotton.
Function: Filters out suspended particles, sand, and other impurities. Suitable for various liquid filtration.
Replacement Cycle: Every 2–4 months.
![Yarn Filter Cartridge]()
3. Carbon Filter Cartridge
Types: Granular Activated Carbon (GAC) and Compressed Activated Carbon (CAC).
Function: Known for strong adsorption properties, eliminates odors, colors, chlorine, and organic impurities.
Replacement Cycle: Every 6–8 months.
![Carbon Filter Cartridge]()
4. PP Pleated Filter Cartridge
Material: Made from pleated polypropylene fabric.
Function: Provides high surface area for efficient sediment and particle removal. Often used in pre-filtration processes.
Replacement Cycle: Every 6–12 months.
![PP Pleated Filter Cartridge]()
5. High Flow Pleated Filter Cartridge
Material: Advanced pleated design with durable polypropylene or polyester.
Function: Filters high flow rates while maintaining low pressure drop. Ideal for industrial applications.
Replacement Cycle: Varies by application, typically every 6–12 months.
![High Flow Pleated Filter Cartridge]()
6. Swimming Pool Filter Cartridge
Material: Polyester fabric or similar durable materials.
Function: Removes debris, particles, and contaminants from pool water, ensuring clarity and hygiene.
Replacement Cycle: Clean regularly, replace every 12–24 months.
7. Carbon Fiber Cartridge
Material: Made of activated carbon fibers.
Function: Provides effective removal of chlorine, organic impurities, and odors, enhancing water taste.
Replacement Cycle: Every 6–8 months.
![Carbon Fiber Cartridge]()
8. Filter Bag
Material: Non-woven fabric or felt made from polypropylene or nylon.
Function: Captures large particles and contaminants in liquid filtration systems.
Replacement Cycle: Replace as needed depending on contamination levels.
![Filter Bag]()
9. Filter Housing
Material: Stainless steel, plastic, or aluminum alloy.
Function: Encases filter cartridges or bags, protecting them and ensuring proper filtration.
Maintenance Cycle: every 12–24 months.
![Filter Housing]()
10. Air Compressor Filter
Material: Specialized filter media for air systems.
Function: Removes oil, water, and particulates from compressed air, ensuring system efficiency.
Replacement Cycle: Every 3–6 months.
![Air Compressor Filter]()
Choosing the Right Filter
Not all water purifiers include every filter type listed above. Certain filters are selected based on specific regional water quality requirements. Understanding these filter types and their roles ensures you can make an informed decision when purchasing a water purifier.