Designed for iSpring RO800G System: This F4RO800 replacement filter pack includes 3x FPPC composite filters and 1x MRO800 reverse osmosis membrane, specifically designed for the iSpring RO800G tankless RO water filtration system Long-Lasting Performance: Each FPPC filter typically lasts up to 12 months, while the MRO800 RO membrane provides effective filtration for up to 36 months under normal usage and water conditions. This kit can last up to 3 years, depending on your incoming water quality and water usage, ensuring your home or business has clean, great-tasting water for the long term Powerful Multi-Stage Filtration: The FPPC filters combine sediment and activated carbon to reduce rust, chlorine, odors, and other common contaminants, while the MRO800 membrane targets dissolved solids and microscopic impurities down to 0.0001 microns. This package delivers up to 800 gallons of purified water per day with an efficient 2.5:1 pure-to-wastewater ratio—ensuring clean, great-tasting water and peak system performance Effortless Filter Replacement: The convenient twist-and-lock design allows quick, tool-free filter changes in seconds—no need to shut off the water. Enjoy consistent performance with simple, hassle-free maintenance