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5-in-1 Filter Cartridge
This Hydrofast HF04 integrated filter cartridge effectively removes impurities, heavy metals, and harmful substances, as well as eliminating unpleasant odors. It delivers safe, healthy, and refreshing drinking water for every hydration.
Polypropylene Sediment Filter
The first-stage polypropylene sediment filter serves as a robust primary barrier, capturing sediment, rust, and various particulate impurities. This protects subsequent filtration stages and improves system efficiency.
CTO Filtration & Advanced RO Membrane
The second layer utilizes a coconut carbon block filter (CTO), which effectively reduces organic pollutants, suspended particles, residual chlorine, and heavy metals to enhance taste and safety. Paired with a high-precision 0.0001μm reverse osmosis membrane, it removes 99.99% of bacteria, viruses, and chemical contaminants, delivering exceptionally pure, healthy drinking water.
Post-Carbon & Remineralization Composite Layer
The fourth layer features a post carbon filter with an average pore size of 2nm, offering high adsorption capacity and rapid absorption properties to further eliminate chlorine, odors, and chemical substances. The fifth-layer mineral filter then replenishes essential minerals, including calcium, magnesium, sodium, and potassium, while balancing pH levels, resulting in water that tastes smooth, naturally sweet, and refreshingly clean.
Convenient Replacement & Compatibility
The HF04 filter cartridge measures ø88*377mm, which is specifically engineered for the Hydrofast C300 countertop water purifier to ensure optimal performance and water quality. Designed for long-term use, it offers a standby service life of up to 12 months for safe, healthy, purified water every day.




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