---
product_id: 465852711
title: "RTW5AK SGS-Tested Reverse Osmosis Alkaline Water Filter System, 6 Stage pH+ Alkaline Remineralization Under Sink RO Water Filtration System Plus Extra 3 Filters, 50 GPD"
brand: "puredrop"
price: "S$419"
currency: SGD
in_stock: true
reviews_count: 10
category: "Pure Drop"
url: https://www.desertcart.sg/products/465852711-rtw5ak-sgs-tested-reverse-osmosis-alkaline-water-filter-system-6
store_origin: SG
region: Singapore
---

# 50 GPD ultra-efficient flow Easy DIY quick-connect install 6-stage alkaline remineralization RTW5AK SGS-Tested Reverse Osmosis Alkaline Water Filter System, 6 Stage pH+ Alkaline Remineralization Under Sink RO Water Filtration System Plus Extra 3 Filters, 50 GPD

**Brand:** puredrop
**Price:** S$419
**Availability:** ✅ In Stock

## Summary

> 💦 Elevate your tap water game with PureDrop’s premium alkaline RO system—because your health deserves the best sip.

## Quick Answers

- **What is this?** RTW5AK SGS-Tested Reverse Osmosis Alkaline Water Filter System, 6 Stage pH+ Alkaline Remineralization Under Sink RO Water Filtration System Plus Extra 3 Filters, 50 GPD by puredrop
- **How much does it cost?** S$419 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/465852711-rtw5ak-sgs-tested-reverse-osmosis-alkaline-water-filter-system-6)

## Best For

- puredrop enthusiasts

## Why This Product

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

## Key Features

- • **Power-Free Purity:** Generates up to 50 gallons daily without electricity—eco-smart hydration for your modern lifestyle.
- • **Pure, Balanced Hydration:** 6-stage filtration restores essential minerals for crisp, alkaline water that beats acidic RO alternatives.
- • **Trusted Quality & Support:** SGS-tested, BPA-free, FDA-compliant system backed by lifetime customer service—peace of mind guaranteed.
- • **Compact Design, Maximum Space:** Smaller tank footprint frees up valuable under-sink storage without sacrificing performance.
- • **Hassle-Free Setup & Maintenance:** Color-coded lines and quick-connect fittings make installation and filter changes a breeze—no plumber needed.

## Overview

The PureDrop RTW5AK is a 6-stage reverse osmosis under-sink water filtration system delivering up to 50 gallons of alkaline, mineral-balanced water daily without electricity. Featuring SGS testing, BPA-free FDA-compliant components, and a compact design, it includes an extra 3-filter set for extended use. Easy to install with quick-connect fittings and supported by lifetime customer service, it offers professional-grade purity and convenience for health-conscious households.

## Description

PureDrop RTW5AK SGS-Tested Reverse Osmosis Alkaline Water Filter System, 6 Stage pH+ Alkaline Remineralization Under Sink RO Water Filtration System Plus Extra 3 Filters, 50 GPD - desertcart.com

Review: PUREDROP - BEST ALL AROUND, GREAT PRICE, GREAT SUPPORT & A HIGH QUALITY RO SYSTEM - Wow Unbelievable. after 4 years - update. 2024. I called and talked with Nick again who provided the VERY BEST customer service I have ever gotten in my entire life. He answered the phone and within minutes my small install problem was solved and he is sending the part I needed at no charge. If you are looking for the best RO system, at the best price, you do not need to look any further. I did extensive research and found the Puredrop RO system to be the best overall. It has the best price, wonderful support, and is a very well-made quality system. ISPRING VS PUREDROP Puredrop is the same company that makes ISpring, which is also a very nice RO system. I was not sure if I should buy the Puredrop RO system compared the ISpring RO system, so I called support and asked the difference. I spoke with both Nick and Don who provided all the answers to my questions so that I could make an educated decision. ISpring RO t is more money, but you get more for your money: Larger Tank, a Clear 1st Stage tank, and a better faucet. In my case, it is just me and my wife, and I do not need a larger tank and I have a faucet from owning other RO systems and I would only be giving up the clear tank with the Puredrop System. CLEAR 1st STAGE TANK If you change your filters on time, there really is no reason to see inside the first stage. If you are forgetful, it may be a good idea to get the Ispring system with the clear first stage tank. FILTERS AND MEMBRANE I had other RO systems in the past, and the biggest issue I have found was the cost to replace the filters-especially the membrane, which can be as high as $40 for some name brands—especially if you have to have the check value built into the membrane. The Puredrop RO has the check valve as a separate component in the system, which eliminates having to buy a membrane one with a built-in check valve. PLUS, I love it that PureDrop provides an extra set of filters for the next time the filters need to be changed. After researching the filters, I found that I can buy generic filters for a lot less and if I wanted the Puredrop brand, it was not that much more. INSTALLATION AND SMALLER TANK The Puredrop RO system, which was easy to install with color coded water lines. So far everything is working fine and I really like the small compact tank, which gives me a lot more room for storage under the sink. There is no reason that I can see to have the larger tank for a family of two. CONCLUSION The Puredrop has been installed for a week when I wrote this review. I suspect that will not have any issues, but even if I do, I know that I can always call support: Nick or Don, and they will for sure take care of any issues I have for years to come.
Review: Very satisfied - We bought this during the latest prime day sale and we are happy with it. The installation went fine, though I did end up watching a couple videos along with using the manual to be sure I had things right. There were no leaks on startup despite there being at least 20 connections that could have a water leak. Most of those already come connected by the factory and you don't have to do them but they are still a possible leak source. I read a comment by a plumber that recommended putting something under the tank as the materials making up its valve are more likely to leak than others. This particular tank is smaller than most under sink systems so is better if it's tight under there. If you have a larger household you may want a bigger tank but I honestly think it's sufficient for most families and it is always refilling when water is depleted. My countertop had a hole already that was occupied by a soap dispenser, so I repurposed it for the included filtered water faucet and we fill a nice-looking dish soap dispenser that sits next to the sink now instead. Drilling the hole in the PVC pipe was much easier than I feared. Make sure it is done above the trap and the hole is the correct diameter. I purchased a digital total dissolved solids (TDS) device and the filtered water has been measuring 2 and 3 TDS, which is very good. The water tastes good to me despite there being no minerals and feels smooth in the mouth. It's nice knowing the water is pretty much as clean and pure as it possibly can be for us and our pets. The extra 3 filters included pushes out the filter buying time to 1 year. Reccomended.

## Features

- 【Restore Balanced Alkalinity】 PureDrop RO under sink water filter system uses a 6-Stage Alkaline Remineralization Layered Filtration for superior water quality. Unlike traditional reverse osmosis systems that produce slightly acidic water, an alkaline remineralization filter - restores healthy minerals and produces a balanced alkalinity. This reliable and ultra-safe Reverse Osmosis water filter system ensures clean, pure, and healthy drinking water.
- 【High Capacity Efficient Filtration】 Supplying up to 50 gallons of clean drinking water per day without any electricity use, this efficient RO water filter system can generate 1 gallon of clean drinking water from less than 3 gallons. PureDrop RO water filters provide unlimited clean, healthy, refreshing crisp tasting water for you and the ones you care about. No more bottled water needed.
- 【Great Value for Money】The 6-stage reverse osmosis water filter includes a premium 3-piece pre-filter replacement kit and a 100% leak-free drinking water faucet. It comes with all the necessary components for easy installation, ensuring a hassle-free setup. High quality PureDrop water filter for sink helps you experience clean, safe, good-tasting water every time you turn on the faucet.
- 【Ultra-Safe & Reliable】This under-sink reverse osmosis system undergoes thorough testing for air leaks, pressure, and cycle resistance, ensuring that itmeets our stringent quality and performance standards. All parts of the RO system are BPA-free. The system is manufactured to comply strictly with FDA standards (CFR-174, 177) and has been tested by independent third-party against NSF/ANSI standards for water quality, material safety, and structural integrity.
- 【Easy Installation & Maintenance】The RO water filtration system includes user-friendly quick-connect fittings, complimentary spare parts, a housing wrench, and all necessary components for a hassle-free installation. For maintenance, simply replace the filters on a regular basis. If you have any inquiries or need assistance with our system, please reach out to us for lifetime technical and customer service support.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B8LJ3FPG |
| Batteries Required? | No |
| Best Sellers Rank | #34,670 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #74 in Under-Sink & Countertop Filtration |
| Brand | PureDrop |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (608) |
| Date First Available | August 3, 2022 |
| Installation Type | User-Installed |
| Item Package Quantity | 1 |
| Item Weight | 22 pounds |
| Item model number | RTW5AK |
| Manufacturer | PureDrop |
| Model Name | RTW5AK |
| Package Information | Bottle |
| Part Number | RTW5AK |
| Power Source | Battery Powered, Non electric |
| Product Dimensions | 16"L x 22"W x 17"H |
| Size | RO water system w/ Alkaline |
| Special Feature | Reduce TDS, reverse osmosis water filter system |
| Special Features | Reduce TDS, reverse osmosis water filter system |
| Style | RO water system w/ Alkaline |
| UPC | 810004173019 |
| Warranty Description | 1-year manufacturer |

## Product Details

- **Brand:** PureDrop
- **Capacity:** 50 Gallons
- **Included Components:** Water filtration system, faucet, installation manual, tank, parts
- **Installation Type:** User-Installed
- **Material:** Alkaline RO Water Filtration
- **Package Information:** Bottle
- **Power Source:** Battery Powered, Non electric
- **Product Dimensions:** 16"L x 22"W x 17"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Reduce TDS, reverse osmosis water filter system

## Images

![RTW5AK SGS-Tested Reverse Osmosis Alkaline Water Filter System, 6 Stage pH+ Alkaline Remineralization Under Sink RO Water Filtration System Plus Extra 3 Filters, 50 GPD - Image 1](https://m.media-amazon.com/images/I/71kTtMMZv6L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ PUREDROP - BEST ALL AROUND, GREAT PRICE, GREAT SUPPORT & A HIGH QUALITY RO SYSTEM
*by N***1 on November 27, 2020*

Wow Unbelievable. after 4 years - update. 2024. I called and talked with Nick again who provided the VERY BEST customer service I have ever gotten in my entire life. He answered the phone and within minutes my small install problem was solved and he is sending the part I needed at no charge. If you are looking for the best RO system, at the best price, you do not need to look any further. I did extensive research and found the Puredrop RO system to be the best overall. It has the best price, wonderful support, and is a very well-made quality system. ISPRING VS PUREDROP Puredrop is the same company that makes ISpring, which is also a very nice RO system. I was not sure if I should buy the Puredrop RO system compared the ISpring RO system, so I called support and asked the difference. I spoke with both Nick and Don who provided all the answers to my questions so that I could make an educated decision. ISpring RO t is more money, but you get more for your money: Larger Tank, a Clear 1st Stage tank, and a better faucet. In my case, it is just me and my wife, and I do not need a larger tank and I have a faucet from owning other RO systems and I would only be giving up the clear tank with the Puredrop System. CLEAR 1st STAGE TANK If you change your filters on time, there really is no reason to see inside the first stage. If you are forgetful, it may be a good idea to get the Ispring system with the clear first stage tank. FILTERS AND MEMBRANE I had other RO systems in the past, and the biggest issue I have found was the cost to replace the filters-especially the membrane, which can be as high as $40 for some name brands—especially if you have to have the check value built into the membrane. The Puredrop RO has the check valve as a separate component in the system, which eliminates having to buy a membrane one with a built-in check valve. PLUS, I love it that PureDrop provides an extra set of filters for the next time the filters need to be changed. After researching the filters, I found that I can buy generic filters for a lot less and if I wanted the Puredrop brand, it was not that much more. INSTALLATION AND SMALLER TANK The Puredrop RO system, which was easy to install with color coded water lines. So far everything is working fine and I really like the small compact tank, which gives me a lot more room for storage under the sink. There is no reason that I can see to have the larger tank for a family of two. CONCLUSION The Puredrop has been installed for a week when I wrote this review. I suspect that will not have any issues, but even if I do, I know that I can always call support: Nick or Don, and they will for sure take care of any issues I have for years to come.

### ⭐⭐⭐⭐⭐ Very satisfied
*by S***Y on October 18, 2023*

We bought this during the latest prime day sale and we are happy with it. The installation went fine, though I did end up watching a couple videos along with using the manual to be sure I had things right. There were no leaks on startup despite there being at least 20 connections that could have a water leak. Most of those already come connected by the factory and you don't have to do them but they are still a possible leak source. I read a comment by a plumber that recommended putting something under the tank as the materials making up its valve are more likely to leak than others. This particular tank is smaller than most under sink systems so is better if it's tight under there. If you have a larger household you may want a bigger tank but I honestly think it's sufficient for most families and it is always refilling when water is depleted. My countertop had a hole already that was occupied by a soap dispenser, so I repurposed it for the included filtered water faucet and we fill a nice-looking dish soap dispenser that sits next to the sink now instead. Drilling the hole in the PVC pipe was much easier than I feared. Make sure it is done above the trap and the hole is the correct diameter. I purchased a digital total dissolved solids (TDS) device and the filtered water has been measuring 2 and 3 TDS, which is very good. The water tastes good to me despite there being no minerals and feels smooth in the mouth. It's nice knowing the water is pretty much as clean and pure as it possibly can be for us and our pets. The extra 3 filters included pushes out the filter buying time to 1 year. Reccomended.

### ⭐⭐⭐⭐⭐ Great taste, plenty of flow
*by S***N on September 25, 2025*

We have had it running for 3+ months with out any issues. The directions were pretty good but I did buy a garbage disposal ro waste adapter. I didn't have enough drain pipe to install the waste clamp so the adapter worked. Everything else came for a complete install for most people plumbing. I installed mine in the basement and ran the tubing up into the kitchen sink cabinet. I also installed a T so the output goes to the fridge and also the facet at the sink. It also comes with a complete set of extra filters so this will last year almost 2 years with out replacements. Water taste great and even the dogs love it.

## Frequently Bought Together

- PureDrop RTW5AK Reverse Osmosis Alkaline Water Filter System, pH+ Alkaline Remineralization Under Sink RO Water Filter System, 6 Stage Reverse Osmosis Water Filtration Plus Extra 3 Filters, 50 GPD
- iSpring ICEK Ultra Safe Fridge Water Line Connection and Ice Maker Installation Kit for Reverse Osmosis RO Systems & Water Filters, 1/4", 20 feet

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-27*