---
product_id: 746325183
title: "Waterdrop T4-A Alkaline Mineral Tankless Reverse Osmosis System, Dual Flow"
brand: "waterdrop"
price: "¥155844"
currency: JPY
in_stock: true
reviews_count: 9
category: "Waterdrop"
url: https://www.desertcart.jp/products/746325183-waterdrop-t4-a-alkaline-mineral-tankless-reverse-osmosis-system-dual
store_origin: JP
region: Japan
---

# Tankless, space-saving design 450 GPD ultra-fast flow Dual flow: RO & alkaline water Waterdrop T4-A Alkaline Mineral Tankless Reverse Osmosis System, Dual Flow

**Brand:** waterdrop
**Price:** ¥155844
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with pure, alkaline, and instant freshness!

## Quick Answers

- **What is this?** Waterdrop T4-A Alkaline Mineral Tankless Reverse Osmosis System, Dual Flow by waterdrop
- **How much does it cost?** ¥155844 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/746325183-waterdrop-t4-a-alkaline-mineral-tankless-reverse-osmosis-system-dual)

## Best For

- waterdrop enthusiasts

## Why This Product

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

## Key Features

- • **450 Gallons Per Day:** High-capacity output meets your busiest kitchen demands without waiting or compromise.
- • **Smart Filter Alerts:** Never miss a replacement with intuitive LED and buzzer reminders—keeping your water pristine and worry-free.
- • **Tankless & Space-Smart:** Compact design frees up 70% more under-sink space while eliminating secondary contamination risks.
- • **Dual Flow, Dual Benefits:** Switch effortlessly between pure RO water and mineral-rich alkaline water for every mood and meal.
- • **10-Stage Precision Filtration:** Advanced multi-layer filtration removes PFOA, PFOS, chlorine, heavy metals, and more for crystal-clear hydration.

## Overview

The Waterdrop T4-A is a cutting-edge, NSF/ANSI 372 certified tankless reverse osmosis system delivering up to 450 gallons of purified water daily. Featuring dual flow options for standard RO and mineral-enhanced alkaline water, it uses a 10-stage filtration process to eliminate contaminants like PFOA, PFOS, chlorine, and heavy metals. Its smart filter life reminders and compact design optimize convenience and space, making it a top-tier choice for health-conscious professionals seeking premium water quality at home.

## Description

Waterdrop T4-A Alkaline Mineral Tankless Reverse Osmosis System, Dual Flow | NSF/ANSI 372 Certified, 10-Stage, 450 GPD Under-Sink RO Filtration System, 2:1 Pure to Drain, BPA Free, Plug-in required - desertcart.com

Review: Love the machine. - Very easy to install, no leaks, and worked well for my sink. I love the very simple plug and play design, it seems very well thought out. Just make sure that when you drink from the water, you let some of the water drain out first as it has been sitting in the plastic hoses. Other than that, seems like a very high quality machine with reasonable filter prices. The water is very pure and tastes wonderful.
Review: Excellent Water Quality and Easy Installation - This home reverse osmosis water filtration system has been a great purchase so far. The water tastes exceptionally clean and fresh, and I appreciate having both purified and alkaline water available. Installation was straightforward and relatively simple to complete. The system does make a slight noise while the storage tank is filling, but it's minor and not disruptive. Overall, I am very pleased with the product's performance and water quality. The real test will be how well it continues to perform over time, but based on my experience so far, I would definitely recommend it.

## Features

- [Dual Water Flow]: The WD-T4-A RO system offers two purified water options: a standard RO-purified stream and a mineral-enhanced alkaline stream. Switch between them effortlessly based on your needs — both deliver contaminant-reduced drinking water. Dual LED ensure complete water safety from filtration to faucet *NOTE: Faucet installation requires drilling holes in the countertop
- [10-Stage Filtration with RO Membrane]: This system reduces harmful substances, including PFOA & PFOS, chlorine, heavy metals, rust, colloids and more impurities, through its comprehensive filtration stages. The dedicated mineral-enriched line then infuses beneficial alkaline minerals, delivering healthier, great-tasting water. 𝐍𝐨𝐭𝐞: This system requires an electrical connection for operation
- [450GPD Flow & 2:1 Pure to Drain]: With a 450-gallon-per-day capacity and industry-leading 2:1 water-saving ratio, the WD-T4-A provides fast, on-demand purified water while reducing wastewater by up to 800% compared to traditional RO systems
- [Smart Filter Life Reminder]: You won't miss a filter change with the indicator lights and buzzer alerts. Replacement intervals: CF filter: 6 months; RO membrane: 24 months; CB filter: 12 months; Alkaline mineralizer: 12 months
- [Tankless Design]: The compact, tank-free system effectively avoids secondary contamination risks associated with water storage tanks, while freeing up 70% more under-sink space than traditional tank-based RO systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0F5V9G355 |
| Best Sellers Rank | #9,882 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #24 in Under-Sink & Countertop Filtration |
| Brand | Waterdrop |
| Brand Name | Waterdrop |
| Capacity | 450 gallons |
| Customer Reviews | 4.5 out of 5 stars 440 Reviews |
| Filter Life Cycle | 6 months |
| Included Components | RO System (CF*1, CB*1, ALK*1, RO*1, Faucet) |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 16.54"L x 6.22"W x 17.95"H |
| Item Weight | 10.98 kg |
| Manufacturer | Waterdrop |
| Material | Reverse Osmosis |
| Material Type | Reverse Osmosis |
| Model Name | WD-RT44D-WAD |
| Model Number | WD-RT44D-WAD |
| Number of Items | 1 |
| Other Special Features of the Product | Alkaline 450GPD Tankless RO, 10-Stage, NSF/ANSI 372 Certified, 2:1 Pure to Drain, Plug-in required |
| Part Number | WD-RT44D-WAD |
| Product Dimensions | 16.54"L x 6.22"W x 17.95"H |
| Purification Method | Reverse Osmosis |
| Special Feature | Alkaline 450GPD Tankless RO, 10-Stage, NSF/ANSI 372 Certified, 2:1 Pure to Drain, Plug-in required |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Waterdrop
- **Capacity:** 450 gallons
- **Included Components:** RO System (CF*1, CB*1, ALK*1, RO*1, Faucet)
- **Installation Type:** Under Sink
- **Item Weight:** 10.98 kg
- **Material:** Reverse Osmosis
- **Model Name:** WD-RT44D-WAD
- **Product Dimensions:** 16.54"L x 6.22"W x 17.95"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Alkaline 450GPD Tankless RO, 10-Stage, NSF/ANSI 372 Certified, 2:1 Pure to Drain, Plug-in required

## Images

![Waterdrop T4-A Alkaline Mineral Tankless Reverse Osmosis System, Dual Flow - Image 1](https://m.media-amazon.com/images/I/719YgI8NGvL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Love the machine.
*by A***N on July 13, 2026*

Very easy to install, no leaks, and worked well for my sink. I love the very simple plug and play design, it seems very well thought out. Just make sure that when you drink from the water, you let some of the water drain out first as it has been sitting in the plastic hoses. Other than that, seems like a very high quality machine with reasonable filter prices. The water is very pure and tastes wonderful.

### ⭐⭐⭐⭐⭐ Excellent Water Quality and Easy Installation
*by F***B on June 22, 2026*

This home reverse osmosis water filtration system has been a great purchase so far. The water tastes exceptionally clean and fresh, and I appreciate having both purified and alkaline water available. Installation was straightforward and relatively simple to complete. The system does make a slight noise while the storage tank is filling, but it's minor and not disruptive. Overall, I am very pleased with the product's performance and water quality. The real test will be how well it continues to perform over time, but based on my experience so far, I would definitely recommend it.

### ⭐⭐⭐⭐⭐ WD-T3-M (actual) Amazing Balance of Performance and Price!
*by K***S on August 23, 2025*

Really love this water filter (WD-T3-M). Most reviews here are from an older model the G3, not what is being actually sold in this listing. Love that they have version that is remineralized without being Alkaline, in addition to an Alkaline version. The unit is easy to install and maintain the filters and is a great balance between available features and price. I knew I wanted a WaterDrop filter but many of the more expensive versions came with features I just didn't want or need and a price tag to match. Getting the features I care about for a great price. Win win. This model series isn’t even available on Waterdrop's own website yet which made me skeptical at first. I called waterdrop and they said it was new and not official released. Not sure why Amazon had it first but took a chance. Install was a bit complicated but just because we have an older home and needed to have an outlet added. If you already have an under sink outlets it should be no problem. I was happy to hire a handyman for my install however. We also got the small pressure tank to run the filtered water to our fridge for cold water and ice. Highly recommend. My husband says it’s the best water he’s ever tasted. I love the taste of our ice now. We are drinking so much more water. Because it is remineralized too I can use this directly in my fancy espresso machine without adding minerals back in. I find the dispense speed to be just fine for our needs. Varies a bit and not super fast but about as fast as it was coming from our fridge dispenser. The video shows how quickly it fills a 16oz glass and the volume (quiet) of the filter system when actively running.

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**Shop now:** [https://www.desertcart.jp/products/746325183-waterdrop-t4-a-alkaline-mineral-tankless-reverse-osmosis-system-dual](https://www.desertcart.jp/products/746325183-waterdrop-t4-a-alkaline-mineral-tankless-reverse-osmosis-system-dual)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-23*