Timely replacement of filter cartridges is essential for the water quality and lifespan of reverse osmosis system. There are 9 pieces of 2.5 in. x 10 in. (industrial standard) filter cartridges included in this genuine iSpring filter pack, make it the convenient 1 year supply for iSpring RCC7D and most other reverse osmosis water filtration systems in the market that use standard 2.5 in. x 10 in. cartridges with DI filter. The same as iSpring water filter systems, these filter cartridges have been tested by independent third-party to meet NSF/ANSI standard for material safety, durability and filtration performance - guaranteed to perform and last for the best. Choose iSpring genuine filter pack for the quality, value and your peace of mind.
2 x 1st stage: 5 micron multi-layer gradient polypropylene snow white filter blocks sediment, sand, dust, rust and anything that causes turbidity
2 x 2nd stage: 5 micron granular activated carbon absorbs unpleasant chlorine, tastes and odors, cloudiness and colors
2 x 3rd stage: 5 micron CTO carbon block absorbs any residual chlorine, tastes and odors, plus compounding pre-filters' efficiency and extending RO membrane's life
1 x 5th stage: total polishing inline carbon absorbs any possible residual tastes and odors
2 x DI filter removes hard water minerals through an ion exchange process, intended to prevent inorganic calcium, magnesium, and soluble iron etc
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