---
product_id: 3591699
title: "FA15 Alkaline Inline Water Filter Cartridge, 10” x 2” with 1/4” Quick Connect, NSF Certified, Add-on for RO Systems, Balances pH & Restores Minerals, 3-Layer Replacement Filter"
brand: "ispring"
price: "6238 kr"
currency: ISK
in_stock: true
reviews_count: 8
category: "I Spring"
url: https://www.desertcart.is/products/3591699-fa15-alkaline-inline-water-filter-cartridge-10-x-2-1
store_origin: IS
region: Iceland
---

# Boosts pH for alkaline water 1/4” quick connect install 3-layer mineral filtration FA15 Alkaline Inline Water Filter Cartridge, 10” x 2” with 1/4” Quick Connect, NSF Certified, Add-on for RO Systems, Balances pH & Restores Minerals, 3-Layer Replacement Filter

**Brand:** ispring
**Price:** 6238 kr
**Availability:** ✅ In Stock

## Summary

> 💧 Upgrade your hydration game with mineral-rich, perfectly balanced water!

## Quick Answers

- **What is this?** FA15 Alkaline Inline Water Filter Cartridge, 10” x 2” with 1/4” Quick Connect, NSF Certified, Add-on for RO Systems, Balances pH & Restores Minerals, 3-Layer Replacement Filter by ispring
- **How much does it cost?** 6238 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/3591699-fa15-alkaline-inline-water-filter-cartridge-10-x-2-1)

## 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

- • **Effortless Upgrade:** Universal compatibility with any under-sink RO system for seamless add-on
- • **Fast & Secure Setup:** Push-fit quick connect design means no-fuss filter replacement in under a minute
- • **Taste the Difference:** Enhanced mineral content delivers crisp, clean, and great-tasting water every time
- • **Restore Vital Minerals:** Replenishes calcium, magnesium & potassium for balanced hydration
- • **Elevate Your Water’s pH:** Transforms acidic RO water into refreshing alkaline goodness

## Overview

The iSpring FA15 Alkaline Inline Water Filter Cartridge is a 10” x 2” NSF-certified 3-layer filter designed to restore essential minerals and balance pH in reverse osmosis systems. Featuring mineral balls, calcite, and corosex, it raises water alkalinity while improving taste. Its 1/4” quick connect ensures fast, hassle-free installation, making it a versatile and essential add-on for any under-sink RO filtration setup.

## Description

Product description

Review: It's perfect? 3 Tips provided. - Tip 1: Flow arrow is a clear engraving and easy to miss. Don't rely on the sticker label orientation in comparison to the video, which some say can be reversed. Tip 2: My TDS went from about 10-15 (iirc) to about 50-65 (My tap is 400TDS). Perfect for me. This TDS tastes great to me. EDIT: placing in front of tank, TDS dropped to 30-35. Not sure if this will cause scaling in the tank though. Tip 3: Took me about 1 minute to install. It's easy if you know how to release the quick connect. I did it in-line to the tank for now, but understanding there's maybe a few oz in the cartridge that will sit and overmineralize. I'll move it to before the tank if it bothers us as it does for some others. EDIT: I've heard of 3 different ways in the reviews to install this alkaline cartridge lol. The 3rd way is after tank but before polisher. Just different tradeoffs. No one has provided an argument for which is definitively best.
Review: Great remineralizer - This worked great but only after I flushed the system 3 times. I also changed the other 3 carbon and debris filters too so it could have been those too. After the 3 flushings, the water was excellent tasting! I used this instead filter instead of the apex one on my roes ph75. No issue at all. Same tubing diameter.

## Features

- BALANCED MINERALIZATION - Standard RO systems remove both harmful pollutants and beneficial minerals, often producing slightly acidic water. The FA15 Alkaline Mineral Filter restores essential minerals like calcium, magnesium, and potassium, balancing pH for healthier drinking water
- ENHANCED TASTE & QUALITY - Enjoy clean, safe, and great-tasting water every time you turn on the faucet, with improved mineral content and a refreshing taste
- UNIVERSAL COMPATIBILITY - Designed to be easily added to any under-sink water filter or RO system, making it a versatile upgrade for your filtration setup
- RAISES pH LEVEL - Effectively increases the pH of RO water, helping to balance acidity for a healthier hydration experience
- QUICK & SECURE INSTALLATION - The updated FA15 alkaline mineral filter features a push-fit quick connection for fast and hassle-free replacement. For installation assistance, refer to the user manual or reach out to our support team

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00FBLGD1S |
| Best Sellers Rank | #1,335 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #9 in Replacement Under-Sink Water Filters |
| Brand | iSpring |
| Brand Name | iSpring |
| Customer Reviews | 4.4 out of 5 stars 1,914 Reviews |
| External Testing Certification | ANSI |
| Global Trade Identification Number | 00662425063543 |
| Included Components | water filters |
| Item Dimensions D x W x H | 2"D x 2"W x 10"H |
| Item Type Name | iSpring FA15 10-inch Inline Quick Connect 3-Layer Alkaline Replacement Water Filter Cartridge with Mineral balls, Calcite, and Corosex for Reverse Osmosis RO System |
| Item Weight | 1 Ounces |
| Manufacturer | iSpring |
| Manufacturer Part Number | FA15 |
| Material | Mineral Balls, Calcite, Corosex |
| Material Type | Mineral Balls, Calcite, Corosex |
| Model Number | c8b999bb-ef40-4965-bd04-b8b06a0346fc |
| Number of Items | 1 |
| Product Benefits | Balances pH and restores essential minerals like calcium, magnesium, and potassium |
| Product Dimensions | 2"D x 2"W x 10"H |
| Set Name | iSpring FA15 Alkaline Water Filter Set |
| UPC | 662425063543 662425077700 |
| Unit Count | 1.0 Count |

## Product Details

- **External Testing Certification:** ANSI
- **Item Weight:** 1 Ounces
- **Material:** Mineral Balls, Calcite, Corosex
- **Product Benefits:** Balances pH and restores essential minerals like calcium, magnesium, and potassium
- **Product Dimensions:** 2"D x 2"W x 10"H

## Images

![FA15 Alkaline Inline Water Filter Cartridge, 10” x 2” with 1/4” Quick Connect, NSF Certified, Add-on for RO Systems, Balances pH & Restores Minerals, 3-Layer Replacement Filter - Image 1](https://m.media-amazon.com/images/I/51RfqOPD5ZL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ It's perfect? 3 Tips provided.
*by O***Y on March 16, 2026*

Tip 1: Flow arrow is a clear engraving and easy to miss. Don't rely on the sticker label orientation in comparison to the video, which some say can be reversed. Tip 2: My TDS went from about 10-15 (iirc) to about 50-65 (My tap is 400TDS). Perfect for me. This TDS tastes great to me. EDIT: placing in front of tank, TDS dropped to 30-35. Not sure if this will cause scaling in the tank though. Tip 3: Took me about 1 minute to install. It's easy if you know how to release the quick connect. I did it in-line to the tank for now, but understanding there's maybe a few oz in the cartridge that will sit and overmineralize. I'll move it to before the tank if it bothers us as it does for some others. EDIT: I've heard of 3 different ways in the reviews to install this alkaline cartridge lol. The 3rd way is after tank but before polisher. Just different tradeoffs. No one has provided an argument for which is definitively best.

### ⭐⭐⭐⭐⭐ Great remineralizer
*by B***P on March 24, 2026*

This worked great but only after I flushed the system 3 times. I also changed the other 3 carbon and debris filters too so it could have been those too. After the 3 flushings, the water was excellent tasting! I used this instead filter instead of the apex one on my roes ph75. No issue at all. Same tubing diameter.

### ⭐⭐⭐⭐⭐ FA15 Alkaline Water Filter Cartridge - I like it
*by K***M on July 22, 2024*

I do like the FA15 Alkaline Water Filter Cartridge for the improvement in the taste it makes with my 5 stage APEC RO unit. My initial TDS was about 20 and was about 40 ppm after installation. My raw tap water is about 300-500 ppm TDS. To me, the RO water always tasted a little flat, I usually added a little tap water or baking soda into my glass to make it taste better. Now I find that the RO + Alkaline filter water tastes pretty darned good and the TDS is in a good range for drinking water. The price seems a little high, but compared to the cost of bottled water and the added waste/taste of plastic bottles, it is well worth it to me. Be aware that the faucet output water flow will be slightly reduced. If you enjoy good tasting water, I do recommend this filter. Edit added: Some people recommend installing a filter like this, before the storage tank. I installed mine after the tank, before the final polishing filter to faucet. If you install this after the polishing filter, before the faucet you 'may' get a slight metallic taste.

## Frequently Bought Together

- iSpring FA15 Alkaline Inline Water Filter Cartridge, 10” x 2” with 1/4” Quick Connect, NSF Certified, Add-on for RO Systems, Balances pH & Restores Minerals, 3-Layer Replacement Filter
- iSpring F7-GAC NSF Certified 1-Year Replacement Filter Cartridge Pack, 7-Count for Standard 5-Stage Reverse Osmosis (RO) Systems
- iSpring Greatwell Reverse Osmosis Membrane 75 GPD 11.75” X 1.75”, Replacement Fits Standard Under Sink RO Drinking Water Filtration System, MC7

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-04-26*