---
product_id: 286612489
title: "F21KU75 2-Year Reverse Osmosis Water Filter Replacement for 7-Stage 75GPD RO Alkaline UV Systems, Fits RCC7AK-UV"
brand: "ispring"
price: "€ 652.18"
currency: EUR
in_stock: true
reviews_count: 5
category: "I Spring"
url: https://www.desertcart.hr/products/286612489-f21ku75-2-year-reverse-osmosis-water-filter-replacement-for-7
store_origin: HR
region: Croatia
---

# Quick push-fit filter replacement 75 GPD high flow rate 97% TDS rejection NSF tested F21KU75 2-Year Reverse Osmosis Water Filter Replacement for 7-Stage 75GPD RO Alkaline UV Systems, Fits RCC7AK-UV

**Brand:** ispring
**Price:** € 652.18
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with iSpring’s 2-year pure water power pack!

## Quick Answers

- **What is this?** F21KU75 2-Year Reverse Osmosis Water Filter Replacement for 7-Stage 75GPD RO Alkaline UV Systems, Fits RCC7AK-UV by ispring
- **How much does it cost?** € 652.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/286612489-f21ku75-2-year-reverse-osmosis-water-filter-replacement-for-7)

## Best For

- ispring enthusiasts

## Why This Product

- Trusted ispring brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Alkaline Mineral Boost:** Restore essential minerals like calcium, magnesium, and potassium for pH-balanced water that tastes better than bottled.
- • **Advanced 7-Stage Filtration:** Experience crystal-clear, mineral-balanced water with sediment, carbon, alkaline, and UV purification layers.
- • **Premium NSF-Certified Membrane:** Trust in a 75GPD Thin Film Composite membrane independently tested to meet NSF/ANSI standards for superior contaminant removal.
- • **2-Year High-Capacity Filter Set:** Enjoy uninterrupted pure water with a full 21-piece replacement kit designed to last two years.
- • **Effortless Quick-Connect Design:** Replace filters faster and hassle-free with secure push-fit connections—no plumber needed.

## Overview

The iSpring F21KU75 is a comprehensive 21-piece, 2-year replacement filter set for 7-stage RO alkaline UV systems, including a 75GPD NSF-certified membrane and alkaline mineral filters. Designed for easy push-fit installation, it delivers up to 97% TDS rejection, restoring essential minerals for fresh, pH-balanced water that outperforms bottled options.

## Description

What is included: - 4 pieces of 5 Micron Sediment Filters #FP15 - 4 pieces of Granular Activated Carbon (GAC) Filters #FG15 - 4 pieces of 5 Micron CTO Carbon Filters #FC15 - 1 piece of 75GPD RO membrane #MC7 - 2 piece of Post Carbon Inline filters #FT15 - 4 piece of Alkaline Mineral filters #FA15 - 2 piece of 11W UV light bulb #UVB11 Fit Models -RCC7AK-UV -RCC1UP-AK Specifications & Dimensions: - Length: 9 3/4", O.D. = 2 7/8" - 1/4" Fitting -Weight: 21 LBS.

Review: This was a great set to replace the filters on my iSpring Reverse Osmosis Water System. Everything I needed was included and the kit is good for 2 years! Very convenient to ensure my system continues to provide quality tasting water for the family. I also wanted to give a big shoutout to Sean from iSpring. I did not know what system I had so I called the iSpring help desk and Sean answered. He quickly identified the system and found the best deal available for my system. Sean also provided videos with step-by-step instructions that explained how to change the filters. When the package arrived, I noticed that the fittings on the new filters were different from what I had so I reached out to Sean and he sent out a conversion kit right away. After replacing all my filters, I noticed a beeping sound whenever I used the faucet so I reached out to Sean once again and he worked with me to quickly resolve the issue. This was such great customer service! Thank you Sean for all your help!!
Review: The iSpring 7 stage RO 2-year filter set is perfect. It comes with all filters to be changed at the prescribed intervals. In the shipping box, each filter has its own compartment to prevent transport damage. Each filter has a paded sleeve and is shrink wrapped to keep them sterile. I test my RO system water with electronic instruments and can say with certainty that the iSpring (123Filter.com) filters and system provide clean, safe, and pure drinking water. The filters sold by iSpring are top quality and last as advertised. Other economy filters are just that. State water lab testing has proven that economy filters I purchased either did not work as well or last as long as advertised. In addition, I am confident that the high-quality. filters from iSpring (123FILTER.COM) will not introduce contaminates into my drinking and cooking water. I can not say the same for the economy brands. As an engineer, I am very thorough and scientific about my selection of products, especially for water used by my family for drinking and cooking. My refrigerator is supplied this same top quality water for great ice as well. We also give our dog this drinking water and are adamant about safe, pure drinking water for pets. I appreciate the iSpring customer support team. They are very patient and helpful. Kudos to Nick who has repeatedly answered my questions and assisted with filters selections that best suit our household usage. Top shelf products! MoTown Mark at the Beach Myrtle Beach, SC"

## Features

- Individually wrapped 2-year high capacity filter replacement cartridge pack for 7-stage RO AK UV systems
- Experience clean water every time you turn on the faucet. Enjoy crystal clear ice cubes, fresher tea and coffee – even better than most bottled water. TDS rejection rate up to 97% (under NSF58 testing condition)
- Alkaline mineral filter produces ph-balanced alkaline water with restored minerals such as natural calcium, magnesium, and potassium ions
- 21 pieces of 10" x 2. 5" replacement water filters included: 4x sediment filters, 4x granular activated carbon filters, 4x carbon block filters, 2x post-carbon filter, 4x alkaline filters, and 2x ultraviolet light bulb
- 75GPD Thin Film Composite (TFC) Membrane included, tested by independent third-party to meet NSF/ANSI Standard. Updated FA15 alkaline mineral filters and FT15 post-carbon filters are built with a secure push-fit quick connection, which allows faster filter replacement. If you have trouble installing the filters, please refer to the user manual or contact us

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BOCDJGK |
| ASIN  | B00BOCDJGK |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #201,645 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #422 in Under-Sink Water Filters |
| Color | White |
| Country of origin  | China |
| Customer Reviews | 4.8 4.8 out of 5 stars (56) |
| Customer reviews | 4.8 4.8 out of 5 stars (56) |
| Date First Available | 2 December 2013 |
| Date First Available  | 2 December 2013 |
| Included components | Water Filter and Fittings |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 7.01 Kilograms |
| Item model number | F21KU75 |
| Item model number  | F21KU75 |
| Manufacturer | iSpring |
| Manufacturer  | iSpring |
| Material | Polypropylene (PP) |
| Number Of Pieces | 21 |
| Part number | F21KU75 |
| Pattern | Filter Replacement |
| Product Dimensions | 6.35 x 6.35 x 25.4 cm; 7.01 kg |
| Product Dimensions  | 6.35 x 6.35 x 25.4 cm; 7.01 kg |
| Size | 21 Piece Set |
| Style | 2-Year Replacement Set |

## Product Details

- **Brand:** iSpring
- **External testing certification:** No
- **Material:** Polypropylene (PP)
- **Product benefits:** Improves water taste and quality, provides alkaline water with essential minerals
- **Product dimensions:** 30.5D x 40.6W x 40.6H centimeters

## Images

![F21KU75 2-Year Reverse Osmosis Water Filter Replacement for 7-Stage 75GPD RO Alkaline UV Systems, Fits RCC7AK-UV - Image 1](https://m.media-amazon.com/images/I/81Izt32HWCL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by K***. on 31 August 2025*

This was a great set to replace the filters on my iSpring Reverse Osmosis Water System. Everything I needed was included and the kit is good for 2 years! Very convenient to ensure my system continues to provide quality tasting water for the family. I also wanted to give a big shoutout to Sean from iSpring. I did not know what system I had so I called the iSpring help desk and Sean answered. He quickly identified the system and found the best deal available for my system. Sean also provided videos with step-by-step instructions that explained how to change the filters. When the package arrived, I noticed that the fittings on the new filters were different from what I had so I reached out to Sean and he sent out a conversion kit right away. After replacing all my filters, I noticed a beeping sound whenever I used the faucet so I reached out to Sean once again and he worked with me to quickly resolve the issue. This was such great customer service! Thank you Sean for all your help!!

### ⭐⭐⭐⭐⭐ Review
*by M***. on 28 January 2024*

The iSpring 7 stage RO 2-year filter set is perfect. It comes with all filters to be changed at the prescribed intervals. In the shipping box, each filter has its own compartment to prevent transport damage. Each filter has a paded sleeve and is shrink wrapped to keep them sterile. I test my RO system water with electronic instruments and can say with certainty that the iSpring (123Filter.com) filters and system provide clean, safe, and pure drinking water. The filters sold by iSpring are top quality and last as advertised. Other economy filters are just that. State water lab testing has proven that economy filters I purchased either did not work as well or last as long as advertised. In addition, I am confident that the high-quality. filters from iSpring (123FILTER.COM) will not introduce contaminates into my drinking and cooking water. I can not say the same for the economy brands. As an engineer, I am very thorough and scientific about my selection of products, especially for water used by my family for drinking and cooking. My refrigerator is supplied this same top quality water for great ice as well. We also give our dog this drinking water and are adamant about safe, pure drinking water for pets. I appreciate the iSpring customer support team. They are very patient and helpful. Kudos to Nick who has repeatedly answered my questions and assisted with filters selections that best suit our household usage. Top shelf products! MoTown Mark at the Beach Myrtle Beach, SC"

### ⭐⭐⭐⭐⭐ Review
*by C***S on 13 October 2024*

Folks, Unfortunately, the water in the part of NC that I live in is substandard. And I have spent countless hours researching and have owned several different water filtration systems over the past decade+. I have learned lots of lessons along the way to include the importance of making sure water filter is NSF certified. I can say without a doubt, my iSpring RO water filter with UV sterilizer is the best by far. Not only for performance, but also for the price to purchase and maintain. In my house, we only drink and cook with water from our RO filter! Great purchase, well worth the investment!

## Frequently Bought Together

- iSpring F21KU75 2-Year Reverse Osmosis Water Filter Replacement for 7-Stage 75GPD RO Alkaline UV Systems, Fits RCC7AK-UV
- iSpring RCC7AK-UV, NSF Certified, 7-Stage Under Sink Reverse Osmosis Water Filtration System with Alkaline Remineralization and UV Filter, Patented Top-Mounted Faucet Design for Easy Installation
- iSpring ICEK Ultra Safe Fridge Water Line Connection and Ice Maker Installation Kit for Reverse Osmosis RO Systems & Water Filters, 1/4", 20 feet

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-12*