---
product_id: 16345202
title: "iSpring F21KU75 NSF Certified 2-Year Reverse Osmosis Water Filter Replacement Cartridge Set for 7-Stage 75 GPD RO Water Filtration Systems w/Alkaline Mineral & UV Filters, 21 Piece"
brand: "ispring"
price: "฿21180"
currency: THB
in_stock: true
reviews_count: 12
category: "I Spring"
url: https://www.desertcart.co.th/products/16345202-ispring-f21ku75-nsf-certified-2-year-reverse-osmosis-water-filter
store_origin: TH
region: Thailand
---

# 21-piece quick-connect set 75 GPD high flow rate NSF certified 97% TDS rejection iSpring F21KU75 NSF Certified 2-Year Reverse Osmosis Water Filter Replacement Cartridge Set for 7-Stage 75 GPD RO Water Filtration Systems w/Alkaline Mineral & UV Filters, 21 Piece

**Brand:** ispring
**Price:** ฿21180
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with iSpring’s all-in-one 2-year water filter set!

## Quick Answers

- **What is this?** iSpring F21KU75 NSF Certified 2-Year Reverse Osmosis Water Filter Replacement Cartridge Set for 7-Stage 75 GPD RO Water Filtration Systems w/Alkaline Mineral & UV Filters, 21 Piece by ispring
- **How much does it cost?** ฿21180 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/16345202-ispring-f21ku75-nsf-certified-2-year-reverse-osmosis-water-filter)

## 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

- • **Plug & Play Convenience:** Updated push-fit quick-connect filters make replacements faster and hassle-free—no plumber needed.
- • **Effortless 2-Year Supply:** Comprehensive 21-piece cartridge set designed for 2 years of uninterrupted premium water quality.
- • **Alkaline Boost for Wellness:** Restores essential minerals like calcium, magnesium, and potassium for perfectly balanced pH alkaline water.
- • **Pure Hydration, Zero Compromise:** NSF-certified filtration removes up to 97% of total dissolved solids for crystal-clear water every time.
- • **UV Protection for Peace of Mind:** Integrated ultraviolet light filters neutralize harmful microorganisms, ensuring safe, fresh water.

## Overview

The iSpring F21KU75 is a 21-piece, NSF-certified reverse osmosis water filter replacement set designed for 7-stage 75 GPD RO systems. It delivers up to 97% TDS rejection, restores essential alkaline minerals, and includes UV filters for enhanced water safety. Engineered for easy push-fit installation, this set ensures two years of premium, great-tasting, mineral-rich water straight from your tap.

## Description

desertcart.com: iSpring F21KU75 NSF Certified 2-Year Reverse Osmosis Water Filter Replacement Cartridge Set for 7-Stage 75 GPD RO Water Filtration Systems w/Alkaline Mineral & UV Filters, 21 Piece : Tools & Home Improvement

Review: Love Osmosis water! - Best tasting water! What a huge difference in what we used to get out of our tap that tasted like dirt. Water pressure is good. We even ran a line to the cold water on the refrigerator. Easy to install, no regrets!
Review: iSpring 2 Year Filter Replacement - 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!!

## 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 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #106,490 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #761 in Replacement Under-Sink Water Filters |
| Brand | iSpring |
| Color | White |
| Compatible Water Purifier Models | AquaTru Alkaline, Connect, iSpring RCC1UP-AK, iSpring RCC7AK-UV |
| Customer Reviews | 4.7 4.7 out of 5 stars (133) |
| Date First Available | March 3, 2013 |
| EU Spare Part Availability Duration | 2 Years |
| External Testing Certification | No |
| Global Trade Identification Number | 00662425058570 |
| Included Components | Water Filter and Fittings |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 15.42 pounds |
| Item model number | F21KU75 |
| Manufacturer | iSpring |
| Material | Polypropylene (PP) |
| Number Of Pieces | 21 |
| Number of Items | 1 |
| Part Number | F21KU75 |
| Pattern | Filter Replacement |
| Product Benefits | Improves water taste and quality, provides alkaline water with essential minerals |
| Product Dimensions | 12"D x 16"W x 16"H |
| Set Name | 21 Piece Set |
| Size | 21 Piece Set |
| Style | 2-Year Replacement Set |
| UPC | 662425058570 |
| Unit Count | 1.0 Count |

## 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:** 12"D x 16"W x 16"H

## Images

![iSpring F21KU75 NSF Certified 2-Year Reverse Osmosis Water Filter Replacement Cartridge Set for 7-Stage 75 GPD RO Water Filtration Systems w/Alkaline Mineral & UV Filters, 21 Piece - Image 1](https://m.media-amazon.com/images/I/81Izt32HWCL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Love Osmosis water!
*by D***R on October 28, 2025*

Best tasting water! What a huge difference in what we used to get out of our tap that tasted like dirt. Water pressure is good. We even ran a line to the cold water on the refrigerator. Easy to install, no regrets!

### ⭐⭐⭐⭐⭐ iSpring 2 Year Filter Replacement
*by K***. on August 31, 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!!

### ⭐⭐⭐⭐⭐ TOP SHELF quality for pure drinking water.
*by M***. on January 28, 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"

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.th/products/16345202-ispring-f21ku75-nsf-certified-2-year-reverse-osmosis-water-filter](https://www.desertcart.co.th/products/16345202-ispring-f21ku75-nsf-certified-2-year-reverse-osmosis-water-filter)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-16*