---
product_id: 260510226
title: "Alkaline Reverse Osmosis Water Filtration System - 10 Stage RO Mineralizing Purifier - Mineral, pH +, Antioxidant - Under Sink Water Filter with Remineralization - 50 GDP"
brand: "express water"
price: "R21150"
currency: ZAR
in_stock: true
category: "Express Water"
url: https://www.desertcart.co.za/products/260510226-alkaline-reverse-osmosis-water-filtration-system-10-stage-ro-mineralizing
store_origin: ZA
region: South Africa
---

# 50 GPD ultra capacity 10-stage advanced filtration DIY quick connect install Alkaline Reverse Osmosis Water Filtration System - 10 Stage RO Mineralizing Purifier - Mineral, pH +, Antioxidant - Under Sink Water Filter with Remineralization - 50 GDP

**Brand:** express water
**Price:** R21150
**Availability:** ✅ In Stock

## Summary

> 💦 Elevate your hydration game with pure, mineralized perfection!

## Quick Answers

- **What is this?** Alkaline Reverse Osmosis Water Filtration System - 10 Stage RO Mineralizing Purifier - Mineral, pH +, Antioxidant - Under Sink Water Filter with Remineralization - 50 GDP by express water
- **How much does it cost?** R21150 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/260510226-alkaline-reverse-osmosis-water-filtration-system-10-stage-ro-mineralizing)

## Best For

- express water enthusiasts

## Why This Product

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

## Key Features

- • **Mineral Boost Tech:** Active Mineral Technology infuses essential calcium, magnesium & potassium for balanced pH and antioxidant benefits.
- • **Pure Power Hydration:** Up to 50 gallons of crisp, mineral-rich alkaline water daily keeps you energized and refreshed.
- • **Next-Level Filtration:** 10-stage reverse osmosis removes 99.99% of contaminants including lead, chlorine, fluoride, and bacteria for the cleanest sip.
- • **Smart Safety & Sustainability:** Emergency leak detector plus eco-friendly coconut carbon filters ensure peace of mind and pure, natural taste.
- • **Effortless Setup & Maintenance:** Quick connect tubing and included tools make under-sink installation a breeze—no plumber needed.

## Overview

The Express Water Alkaline Reverse Osmosis System delivers up to 50 gallons per day of premium alkaline water through a 10-stage filtration process that removes 99.99% of harmful contaminants. Featuring Active Mineral Technology, it replenishes essential minerals for enhanced taste and antioxidant benefits. Designed for easy under-sink installation with quick connect tubing and equipped with safety leak detection, this NSF-certified system ensures clean, healthy water straight from your tap without professional help.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00MU20LN2 |
| Best Sellers Rank | #54,512 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #134 in Under-Sink Water Filters |
| Brand | Express Water |
| Brand Name | Express Water |
| Capacity | 50 gallons_per_day |
| Container Type | Dispenser |
| Customer Reviews | 4.6 out of 5 stars 2,396 Reviews |
| EU Spare Part Availability Duration | 1 Years |
| Global Trade Identification Number | 00705332529525 |
| Included Components | Alkaline Reverse Osmosis System |
| Included components | Alkaline Reverse Osmosis System |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 48.3L x 45.7W x 48.3H centimeters |
| Item Weight | 29.5 Pounds |
| LowerTemperature Range | 40 Degrees Fahrenheit |
| Manufacturer | Express Water |
| Material | Alloy Steel , Brass , Plastic |
| Material Type | Alloy Steel, Brass, Plastic |
| Maximum Flow Rate | 0.8 Gallons Per Minute |
| Model Name | ROALK5D |
| Model Number | ROALK** |
| Operating Pressure Range | 40-80 PSI |
| Other Special Features of the Product | Chlorine Reduction, NSF certified |
| Part Number | ROALK5D |
| Power Source | Water Pressure |
| Product dimensions | 48.3L x 45.7W x 48.3H centimeters |
| Purification Method | Reverse Osmosis |
| Special features | Chlorine Reduction , NSF certified |
| Supported Water TDS Level Maximum (PPM) | 2000 |
| UPC | 705332529525 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 100 Degrees Fahrenheit |

## Product Details

- **Brand:** Express Water
- **Capacity:** 50 G/day
- **Material:** Alloy Steel, Brass, Plastic
- **Product dimensions:** 48.3L x 45.7W x 48.3H centimeters
- **Special features:** Chlorine Reduction, NSF certified

## Images

![Alkaline Reverse Osmosis Water Filtration System - 10 Stage RO Mineralizing Purifier - Mineral, pH +, Antioxidant - Under Sink Water Filter with Remineralization - 50 GDP - Image 1](https://m.media-amazon.com/images/I/81H0jbAc8GL.jpg)

## Questions & Answers

**Q: How often do I need to replace the filters in this unit?**
A: Each filter has a rated life and you'll have to calculate how much you're using to figure out. A good rule of thumb is to replace the sediment filter the most often (as it starts looking dirty, prob 1-6mos). Change the carbon filters on a schedule because chlorine is the most dangerous thing to let through to the membrane (usually 6-12mos). Chlorine will quickly damage the membrane(most expensive to replace, usually 1-2yrs). Letting hot water run through the system opens the pores on the membrane and let's contaminants through. Also, when you change carbon filters, let them flush to the drain before connecting output to membrane (will keep carbon dust from settling in the membrane pores). The easiest way to check if you need to replace the membrane is with an inexpensive ppm/tds meter, you should be in the 0-50ppm range, depending on your starting ppms of the tap (collect sample before it reaches the mineralizer to test). Once ppms start creeping up, you need to change your membrane. You will need a ph tester to determine if the mineralizer is exhausted. Each filter really has it's own rate it wears out. I've worked with reef tanks and hydroponics most of my life so I help these tips help.

**Q: How much water is being wasted while filtering?**
A: As I did my research this one i found was about 1 to 1 so if I remeber correctly, please dont quote this but I did by this one becuase it wasted the least amount of water per gallon i looked at.  I have had it now for almost two years and still on the same filters and i use it for everything i can

**Q: What’s the difference between this one at 100 and the one at 50 they are ten bucks difference? Thanks**
A: The productivity rate is the difference, 100 GPD is a bit faster.

**Q: How do I know when to change filter?**
A: 6 month to a year it depends how many people use the filter during the day most people will change it every year

## Frequently Bought Together

- Express Water Reverse Osmosis Alkaline Water Filtration System – 10 Stage RO Water Filter with Faucet and Tank – Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 50 GPD
- Express Water – 3 Year Reverse Osmosis System Replacement Filter Set – 23 Water Filters with 50 GPD RO Membrane, Carbon GAC, ACB, PAC Filters, Sediment SED Filters – 10 inch Size

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-08-16*