iSpring F21KU75 NSF/ANSI 58 Certified 7-Stage 75GPD RO 2-Year Water Filter Replacement, Fits RCC7AK-UV

$239.99

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Valid Date: 10.27.2025-10.31.2025.

About this item

21 pieces of 10" x 2.5" replacement water filters included, 2-year supply
Fits iSpring 7-Stage RO Alkaline UV water systems
Produces pH 8-9 alkaline water and gives back minerals required by the human body such as calcium, magnesium; 11W UV light bulb included
75GPD Thin Film Composite (TFC) Membrane included, tested by independent third-party to meet NSF/ANSI standard. TDS rejection rate up to 97% (under NSF58 testing condition)
NSF/ANSI 58 Certified: Independently tested and certified to meet NSF/ANSI 58 standards, ensuring reliable removal of harmful contaminants for safe, high-quality drinking water.

Frequently Bought Together

iSpring F21KU75 NSF/ANSI 58 Certified 7-Stage 75GPD RO 2-Year Water Filter Replacement, Fits RCC7AK-UV

$239.99

Reverse Osmosis Membrane

4th Stage

The reverse osmosis membrane is a thin film composite membrane that can remove up to 99% of over 1, 000 contaminants in the water, including lead (removes up to 98% of lead), chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more.

Tested by independent third-party to meet NSF/ANSI Standards, iSpring Reverse Osmosis Membrane is made of food-grade high capacity material that provides high packing density to remove contaminants. With the 0.0001 micron size, it only allows water molecules to squeeze through and virtually nothing else.

As the heart of a Reverse Osmosis System, each iSpring Reverse Osmosis membrane has been inspected under the highest standards in the industry and has passed the quality check before it’s shipped to each customer. It is recommended that you replace the reverse osmosis membrane every two to three years.

Membrane Sizes

MC1: 100GPD Reverse Osmosis Membrane

MC7: 75GPD Reverse Osmosis Membrane

MC5: 50GPD Reverse Osmosis Membrane

For higher GPD usage, please visit iSpring for commercial grade RO systems

6th Stage Alkaline Filter

The RO membrane removes not only harmful pollutants but also most minerals. As a result, a standard 5 stage RO system produces slightly acidic water with a pH of 7.0 or less.

As the 6th stage Alkaline filter, iSpring alkaline filter (FA15) restores minerals and produces balanced alkalinity. It uses natural mineral stones as the filtration media and never sacrifices quality for quantity.

It can last up to 6-12 months depending on your source water and usage.
6th / 7th Stage UV Filter

Unique flow sensor switch turns the UV unit on and off automatically with water flow, saving power and lengthening the life of the UV lamp.

Flow rate: 1.0 GPM; Lamp lasts 8,000 hours. It is recommended that you replace the UV bulb every year.

Sediment Filter

The Sediment Filter works as the first barrier in the Reverse Osmosis System, removing solid particles like silt, rust and dirt from the water and reducing a significant percentage of contaminants in the water. It prevents the other filters from getting clogged with fine particles and reduces the risk of damages to the other components.

iSpring’s first stage Sediment Filter (FP15) features a 5 micron size, perfect for capturing most of the fine sediments in the municipal water and preventing issues from clogs and pressure loss with filters that have smaller micron sizes.
Granular Activated Carbon Filter

Furthermore, the iSpring 2nd stage Granular Activated Carbon (GAC) filter (FG15) includes special carbon media that filters out impurity in the water, which protects and prolong the lifespan of the reverse osmosis membrane.

Carbon Block Filter

3rd Stage

Further removes any remaining chlorine, tastes, and odors. Replace approximately every 6 months.
Post Carbon Filter

Activated Carbon filters can trap and absorb organic chemicals and chlorine from the water effectively with its ability of mechanical filtration and physical adsorption. It can remove odors and bad taste.

iSpring 5th Stage Post Carbon filter (FT15) works as the final stage in the RO system to capture any particles that may have accumulated inside the tank before pure water is delivered to the faucet. It can last up to 12 months depending on your source water and usage.