---
product_id: 3591699
title: "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"
brand: "ispring"
price: "R$643"
currency: BRL
in_stock: true
reviews_count: 13
url: https://www.desertcart.com.br/products/3591699-ispring-fa15-alkaline-inline-water-filter-cartridge-10-x-2
store_origin: BR
region: Brazil
---

# Balances pH & restores minerals 1/4” quick connect install 3-layer mineral filtration 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

**Brand:** ispring
**Price:** R$643
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water, elevate your life — mineralized hydration made simple!

## Quick Answers

- **What is this?** 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 by ispring
- **How much does it cost?** R$643 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/3591699-ispring-fa15-alkaline-inline-water-filter-cartridge-10-x-2)

## 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

- • **pH Perfected:** Elevates your RO water’s pH from acidic to alkaline for healthier daily hydration.
- • **Effortless Upgrade:** Universal compatibility with any under-sink RO system—plug & play with quick connect fittings.
- • **Taste the Difference:** Experience crisp, refreshing water with enhanced mineral content and no weird aftertaste.
- • **Mineral-Rich Hydration:** Restores essential calcium, magnesium & potassium for balanced, revitalizing water.
- • **Fast & Foolproof Installation:** Push-fit quick connect design lets you swap filters in under a minute—no plumber needed.

## Overview

The iSpring FA15 is a 10-inch, 3-layer alkaline inline water filter cartridge designed to enhance reverse osmosis systems by restoring vital minerals and balancing pH. NSF certified and featuring a 1/4” quick connect, it ensures easy installation and delivers healthier, better-tasting water by adding calcium, magnesium, and potassium back into purified water.

## Description

desertcart.com: 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 : Tools & Home Improvement

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: Seems to work as advertised - Was worried this product wouldn't work as advertised but it did. I connected this filter after post carbon filter on RO system. Water is also treated pre the RO system with having a water softener with additional sediment filters and UV. Did before and after testing of the RO water. Water becomes TDS 26 from 7 and a PH of 10.01 from 7.20. No noticeable weird taste or smell. Seems to perform as expected. Had to go up a size from filter tubing to supply line to home. Don't know why they choose to have the flow be smaller tubing if you are supposed to attach this after post carbon. My post carbon is the larger size and so I have to down the size and up again.

## 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 | #1,739 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Replacement Under-Sink Water Filters |
| Brand | iSpring |
| Brand Name | iSpring |
| Customer Reviews | 4.5 out of 5 stars 2,003 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 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

![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 - Image 1](https://m.media-amazon.com/images/I/51RfqOPD5ZL.jpg)
![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 - Image 2](https://m.media-amazon.com/images/I/71gCSqgaO1L.jpg)
![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 - Image 3](https://m.media-amazon.com/images/I/61NqcWAFXHL.jpg)
![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 - Image 4](https://m.media-amazon.com/images/I/61NkyhJmczL.jpg)
![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 - Image 5](https://m.media-amazon.com/images/I/71yuc2Lt0IL.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.

### ⭐⭐⭐⭐⭐ Seems to work as advertised
*by D***T on January 2, 2026*

Was worried this product wouldn't work as advertised but it did. I connected this filter after post carbon filter on RO system. Water is also treated pre the RO system with having a water softener with additional sediment filters and UV. Did before and after testing of the RO water. Water becomes TDS 26 from 7 and a PH of 10.01 from 7.20. No noticeable weird taste or smell. Seems to perform as expected. Had to go up a size from filter tubing to supply line to home. Don't know why they choose to have the flow be smaller tubing if you are supposed to attach this after post carbon. My post carbon is the larger size and so I have to down the size and up again.

### ⭐⭐⭐⭐⭐ long lasting
*by P***N on June 21, 2026*

Long lasting, easy to add inline. Did not check difference in pH, and it does not influence 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 Brazil*
*Store origin: BR*
*Last updated: 2026-07-29*