---
product_id: 14287676
title: "ALK System"
brand: "express water"
price: "€ 705.36"
currency: EUR
in_stock: true
category: "Express Water"
url: https://www.desertcart.gr/products/14287676-alk-system
store_origin: GR
region: Greece
---

# 50 GPD ultra-pure flow 10-stage advanced filtration NSF Certified 372 safety ALK System

**Brand:** express water
**Price:** € 705.36
**Availability:** ✅ In Stock

## Summary

> 💦 Elevate your hydration game with pure, mineral-rich water on demand!

## Quick Answers

- **What is this?** ALK System by express water
- **How much does it cost?** € 705.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/14287676-alk-system)

## 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

- • **Smart Leak Detection:** Built-in leak sensor protects your home, giving you peace of mind 24/7.
- • **Sleek & Durable Design:** Deluxe chrome faucet paired with BPA-free materials ensures style and safety in every drop.
- • **Pure Powerhouse Filtration:** Removes 99.99% of 100+ contaminants including lead, chlorine & PFAs for crystal-clear hydration.
- • **Alkaline Boost for Wellness:** Infuses essential minerals like calcium & magnesium to elevate your water’s taste and health benefits.
- • **Effortless Under-Sink Setup:** Quick-connect design means zero plumber fees and seamless integration into your kitchen space.

## Overview

The Express Water ROALK5D is a 10-stage under-sink reverse osmosis system delivering up to 50 gallons per day of NSF Certified 372 alkaline water. It removes 99.99% of over 100 contaminants while adding essential minerals for enhanced taste and health. Featuring a deluxe chrome faucet, BPA-free components, leak detection, and easy DIY installation, it’s designed for modern kitchens seeking premium, worry-free hydration.

## Description

Make the purest alkaline mineral water with your own home alkaline water system. Great in the kitchen: Improve the taste of your cooking, coffee, ice, and drinks. Experience true Reverse Osmosis purification. Safe filtered fresh tasting H2O: Removes up to 99.99% of contaminants including Lead, Chlorine, Fluoride, Cyanide, Giardia, Radium, Asbestos, Calcite, Heavy Metal, Bacteria, Viruses, Pharmaceuticals, and over 100 other contaminants. Get setup fast with our Quick Connect tubing system. Long lasting filters of the highest capacity standards mean you only need to change your filters every six months. Includes fast flow faucet with 0.8 GPM delivery. A compact system made to fit under a sink in a cabinet. Best for house, apartment, residential, well water, industrial, rv, machine, and office uses. Certified by an independent laboratory to NSF standard 58.Comes with 4 gallon (3.2 gallon water capacity) storage tank and tank stand. Your tank can sit upright or on it’s side to make sure it fits under most kitchen cabinets. Includes all filters needed for setup and first 6 months of use. Can be wall / cabinet mounted or freestanding, made for indoor use. Can be installed undersink, in a basement, or other remote locations, you may need additional tubing or a delivery pump depending on how far away you plan to install or if you plan to link to a refrigerator as well. For every one gallon of water produced the system discharges between one and three gallons (depending on the pressure and quality of your incoming water). The system is compatible with 3/8" and 1/2" under sink connections. Includes filter housing wrench. Operates on 40-80 PSI water pressure, you may need a Booster Pump or Pressure Regulator depending on your water pressure. The water is cleaner and more convenient than any pitcher, faucet filter, or counter top systems. Express Water’s 10 Stage Reverse Osmosis Water Alkaline Filtration System ROALK5D is the complete solution for your drinking water.

## Features

- Reverse Osmosis Water Filter: Experience what water should taste like with the Express Water reverse osmosis water filtration system filtering up to 99. 99% of Lead, Chlorine, Fluoride, PFAs/PFOs, Calcium, Arsenic, and more
- Alkaline Water Filter: Express Water’s Alkaline Water Filter with Active Mineral Technology adds Calcium, Potassium, Magnesium, and other minerals to your water
- Under Sink Water Filter: Don’t waste money on professional installation. Express Water’s quick and easy-to-understand design means you can install and understand everything about your new water filtration system
- Quality : Rest easy with our 1-year on all Express Water Reverse Osmosis Water Systems. System dimensions: 17x15x5 inches, Tank dimensions: 15x12x12 inches
- Under Sink Water Filter System: No need to mess with refilling or activating your water filter, Express Water’s water filtration systems automatically fill your water tank with high quality drinking water

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00MU20LN2 |
| Best Sellers Rank | #5,930 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Under-Sink & Countertop Filtration |
| Brand Name | EXPRESS WATER |
| Capacity | 50 gallons_per_day |
| Container Type | Tank |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,495) |
| Global Trade Identification Number | 00705332529525 |
| Included Components | Alkaline Reverse Osmosis System |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 15"L x 5"W x 17"H |
| Item Weight | 29.5 pounds |
| LowerTemperature Range | 40 °F |
| Manufacturer | Express Water |
| Material Type | Brass Faucet, Plastic System, Steel Tank |
| Maximum Flow Rate | 0.8 gpm |
| Model Name | ROALK5D |
| Model Number | ROALK** |
| Number of Items | 1 |
| Operating Pressure Range | 40-80 psi |
| Other Special Features of the Product | NSF certified |
| Part Number | ROALK5D |
| Purification Method | Alkaline, Reverse Osmosis |
| Supported Water TDS Level Maximum (PPM) | 2000 |
| UPC | 705332529525 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 100 °F |

## Product Details

- **Brand:** EXPRESS WATER
- **Capacity:** 50 gallons_per_day
- **Included Components:** Alkaline Reverse Osmosis System
- **Installation Type:** Under Sink
- **Item Weight:** 29.5 pounds
- **Material:** Brass Faucet, Plastic System, Steel Tank
- **Package Information:** Tank
- **Product Dimensions:** 15"L x 5"W x 17"H
- **Purification Method:** Alkaline, Reverse Osmosis
- **Special Feature:** NSF certified

## Images

![ALK System - Image 1](https://m.media-amazon.com/images/I/81H0jbAc8GL.jpg)

## Available Options

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

## 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 Greece*
*Store origin: GR*
*Last updated: 2026-08-13*