---
product_id: 626976765
title: "RO400 Reverse Osmosis System, Tankless Water Filtration System, 400 GPD Fast Flow Under Sink RO System with Brushed Nickel Faucet, 2.5:1 Pure to Drain Ratio, TDS Reduction, White"
brand: "ispring"
price: "€ 1004.55"
currency: EUR
in_stock: true
reviews_count: 13
category: "I Spring"
url: https://www.desertcart.nl/products/626976765-ro400-reverse-osmosis-system-tankless-water-filtration-system-400-gpd
store_origin: NL
region: Netherlands
---

# 400 GPD ultra-fast flow Built-in filter life indicator 2.5:1 pure to drain ratio, 400% water efficient RO400 Reverse Osmosis System, Tankless Water Filtration System, 400 GPD Fast Flow Under Sink RO System with Brushed Nickel Faucet, 2.5:1 Pure to Drain Ratio, TDS Reduction, White

**Brand:** ispring
**Price:** € 1004.55
**Availability:** ✅ In Stock

## Summary

> 💧 Pure water, zero compromise—upgrade your hydration game today!

## Quick Answers

- **What is this?** RO400 Reverse Osmosis System, Tankless Water Filtration System, 400 GPD Fast Flow Under Sink RO System with Brushed Nickel Faucet, 2.5:1 Pure to Drain Ratio, TDS Reduction, White by ispring
- **How much does it cost?** € 1004.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/626976765-ro400-reverse-osmosis-system-tankless-water-filtration-system-400-gpd)

## 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

- • **Eco-Smart Efficiency:** Tankless design with a 2.5:1 pure to drain ratio saves up to 70% space and slashes water waste by 400% vs. traditional RO systems.
- • **Filter Life at a Glance:** Intuitive LED indicator alerts you before filter replacement, ensuring peak performance without guesswork or downtime.
- • **Rapid Refresh, Zero Wait:** Delivers up to 0.4 GPM so your glass fills in under 8.5 seconds—never wait for pure water again.
- • **DIY Friendly Installation:** All-in-one water line tech and tankless setup make under-sink installation a breeze—upgrade your water quality without a plumber.
- • **99% Contaminant Eradication:** Advanced 4-in-1 PCT filter removes over 1,000 harmful impurities including lead, fluoride, chlorine, and arsenic for crystal-clear hydration.

## Overview

The iSpring RO400 is a cutting-edge tankless reverse osmosis system delivering up to 400 gallons per day with a highly efficient 2.5:1 pure to drain ratio. Its advanced 4-in-1 filtration removes 99% of over 1,000 contaminants, including lead and fluoride, while a built-in filter life indicator ensures hassle-free maintenance. Designed for easy under-sink installation, this space-saving system provides fast, clean water with minimal waste, perfect for health-conscious professionals seeking premium hydration.

## Description

iSpring RO400 Reverse Osmosis System, Tankless Water Filtration System, 400 GPD Fast Flow Under Sink RO System with Brushed Nickel Faucet, 2.5:1 Pure to Drain Ratio, TDS Reduction, White : desertcart.co.uk: DIY & Tools

Review: Great water filter - So happy with this, a big upgrade from the tank option. Water tastes amazing, we were without a filter for a period of time and it was awful drinking tap water. Installed it myself after buying a three way tap which was pretty straightforward. Water also filters very quickly .
Review: Really happy with it..!!! - We wanted a quiet water filer under the sink and we got one!!! Good taste and quality of water, very easy to install.

## Features

- [400 GPD & 2.5:1 Pure Wastewater Ratio]: The iSpring Under Sink Reverse Osmosis Water Filter System RO400 has a 2.5:1 pure wastewater ratio, which is up to 400% more water efficient than traditional under sink RO systems. Tankless reverse osmosis systems flow up to 0.4 GPM with minimal waste, and RO water filtration systems take less than 8.5 seconds to fill a glass of water
- [Highest Impurity Removal Rate]: The under-sink RO water filter system converts tap water into clean RO drinking water. The 4-in-1 PCT filter removes up to 99% of more than 1,000 harmful contaminants such as chlorine, fluoride, lead (up to 98%), arsenic, asbestos, calcium, sodium, sediment, sand, odours, etc. The TDS removal rate is up to 99%
- [Built-in Filter Life Indicator]: The Filter Life Indicator stays blue and starts flashing red when less than 5% of the corresponding filter life is left, and changes to red when the filter needs to be replaced. It is recommended that filters be replaced on a scheduled basis to maintain high performance filtration. You can find replacement filters by searching for FPCT400 and MRO400EU.
- [Easy to Install and Maintain]: All-in-one water line technology makes the reverse osmosis water filtration system easy to install on your own. It can be installed under a sink and the tankless design saves up to 70% of space.
- [Clean Mode]: Press Press the "Flush" button it will flush the reverse osmosis membrane for 30 seconds to extend its life.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D35FH65Q |
| Batteries Required? | No |
| Best Sellers Rank | 110,839 in DIY & Tools ( See Top 100 in DIY & Tools ) 53 in Under-Sink Filters |
| Colour | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (382) |
| Date First Available | 2 May 2024 |
| Flow rate | 0.4 Gallons Per Minute |
| Installation method | Under Sink |
| Item Weight | 11.4 kg |
| Item model number | RO400 |
| Manufacturer | iSpring |
| Part number | RO400EU |
| Power source type | Corded Electric |
| Product Dimensions | 15 x 20 x 64 cm; 11.42 kg |
| Size | 400 GPD |
| Special Features | Tankless |

## Product Details

- **Brand:** iSpring
- **Capacity:** 400 G/day
- **Included components:** reverse osmosis system
- **Installation type:** Under Sink
- **Material:** Glass
- **Package information:** Glass
- **Power source:** Corded Electric
- **Product dimensions:** 15L x 20W x 64H centimetres
- **Purification method:** Reverse Osmosis, Sand
- **Special feature:** Tankless

## Images

![RO400 Reverse Osmosis System, Tankless Water Filtration System, 400 GPD Fast Flow Under Sink RO System with Brushed Nickel Faucet, 2.5:1 Pure to Drain Ratio, TDS Reduction, White - Image 1](https://m.media-amazon.com/images/I/61EI6CTPWcL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great water filter
*by H***B on 26 September 2025*

So happy with this, a big upgrade from the tank option. Water tastes amazing, we were without a filter for a period of time and it was awful drinking tap water. Installed it myself after buying a three way tap which was pretty straightforward. Water also filters very quickly .

### ⭐⭐⭐⭐⭐ Really happy with it..!!!
*by D***S on 29 July 2025*

We wanted a quiet water filer under the sink and we got one!!! Good taste and quality of water, very easy to install.

### ⭐⭐⭐⭐⭐ Great product.
*by K***R on 2 August 2025*

Easy to install, great quality water.

## Frequently Bought Together

- iSpring RO400 Reverse Osmosis System, Tankless Water Filtration System, 400 GPD Fast Flow Under Sink RO System with Brushed Nickel Faucet, 2.5:1 Pure to Drain Ratio, TDS Reduction, White
- 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, White

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-09*