---
product_id: 115961132
title: "US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + CTO (Newest Version)"
brand: "ispring"
price: "€ 438.72"
currency: EUR
in_stock: true
reviews_count: 13
category: "I Spring"
url: https://www.desertcart.fi/products/115961132-us31-classic-3-stage-under-sink-water-filtration-system-drinking
store_origin: FI
region: Finland
---

# 1 GPM fast flow rate 3-stage filtration tech clear see-through housing US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + CTO (Newest Version)

**Brand:** ispring
**Price:** € 438.72
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your tap water game—because clean water is the new luxury.

## Quick Answers

- **What is this?** US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + CTO (Newest Version) by ispring
- **How much does it cost?** € 438.72 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/115961132-us31-classic-3-stage-under-sink-water-filtration-system-drinking)

## 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

- • **Fast Flow, No Wait:** Delivers up to 1 gallon per minute—20x faster than typical pitchers—perfect for busy kitchens and health-conscious pros.
- • **Sleek European Design:** Brushed nickel faucet with clear housing blends style with function, making filter checks effortless and elegant.
- • **Mineral-Rich Hydration:** Retains healthy minerals by not reducing TDS, ensuring every sip supports your wellness and vitality.
- • **Triple-Action Purification:** Sediment, GAC carbon & CTO filters remove heavy metals, chemicals, chlorine taste & odor for pristine water.
- • **Effortless Installation & Maintenance:** Tool-free setup and easy filter swaps every 6-12 months keep your water fresh without hassle or downtime.

## Overview

The iSpring US31 Classic is a premium 3-stage under-sink water filtration system featuring sediment, GAC carbon, and CTO filters. It delivers fresh, contaminant-free water at a rapid 1 GPM flow rate, with a stylish brushed nickel faucet and clear housing for easy monitoring. Designed for easy installation and maintenance, it preserves essential minerals while removing heavy metals, chemicals, chlorine taste, and odors, making it an ideal choice for health-conscious households and professionals seeking superior water quality.

## Description

Efficiently removes sediment, heavy metals, chemicals, and chlorine taste/odor with 3-stage purification. Delivers fresh, clean water at fast flow rate up to 1 GPM.

Review: Buy These - I have a pond and to reduce the heavy metals when topping up I use these in my filtration , does the job good quality and the value for money means I can change my filters more often than recommended , easy to use quick delivery 😀😀😀
Review: Excellent - easy to fit and much better tasting water. Great customer service too! - I'm really pleased with it! After a few days for the tiny bubbles (which made the water look cloudly at first) the water is noticeably improved over our tap water supply and it's now my go-to source for drinking water. No more expensive bottled water, no more plastic waste! So good I bought a second one for our office. There was a small broken connector when it arrived but I'm still giving 5 stars as the customer service was excellent and they got me a replacement part very quickly

## Features

- [Classic Drinking Filter]: The water undergoes a three-stage purification process: PP sediment filtration, GAC carbon filter and a unique CTO filtration in the 3rd layer. This system efficiently removes common drinking water sediments such as dust, sand, particles, dirt, and rust. Additionally, it effectively eliminates heavy metals, harmful chemicals, Chloramine, cloudiness, colors, chlorine taste, and odor.
- [Fresh Healthy Water Supplier]: The on-demand fast flow rate of the iSpring US31 allows it to meet the widest possible range of needs in your home. Up to 20x more effective than the common water pitcher dispenser. Flow Rate: Up to 1GPM depending on source water pressure. Maxim Pressure: 90psi. It washes fresh produce like fruit and vegetables, brings health protection, can provide your entire family with delicious, clean water straight from your tap.
- [Excellent Quality and Design]: Features beautiful European-designed brushed nickel all-metal faucet and clear see-through 1st stage housing. Clear see-through 1st stage housing makes filter inspection a snap. Manufactured to comply strictly with FDA standards and tested by independent third party against NSF/ANSI standards (42, 53, 61) for water quality, material safety and structural integrity.
- [Easy to Install and Maintain]: This system is designed for easy installation, low maintenance, and features dual carbon block filters along with a high-capacity sediment filter. The sediment filter protects and extends the life of your system, while the carbon block filters work to remove many harmful contaminants a. You can replace the filter every 6 to 12 months, judged by the water’s taste.
- [TDS Note]: This under sink water filter will not reduce the TDS of the incoming water. Instead, it keeps the healthy minerals in your water.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07CHXVRS5 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 31,555 in DIY & Tools ( See Top 100 in DIY & Tools ) 9 in Under-Sink Filters |
| Colour | Purple, Silver, White |
| Customer Reviews | 4.6 4.6 out of 5 stars (4,090) |
| Date First Available | 15 Mar. 2018 |
| Flow rate | 1 Gallons Per Minute |
| Installation method | Under Sink |
| Item Package Quantity | 1 |
| Item Weight | 5.45 kg |
| Item model number | US31 |
| Manufacturer | iSpring Water Systems |
| Part Number | US31 |
| Pattern | Water Filtration System |
| Power Source | Manual Operation |
| Product Dimensions | 33.02 x 13.46 x 36.07 cm; 5.45 kg |
| Size | 13"L x 5.3"W x 14.2"H |
| Special Features | Tankless |
| Style | Under Sink Water System |

## Product Details

- **Brand:** iSpring
- **Capacity:** 1 gallons
- **Included components:** housings, filters, parts and tubings, faucet and mounting bracket
- **Installation type:** Under Sink
- **Material:** Carbon Fibre
- **Package information:** Faucet
- **Power source:** Manual Operation
- **Product dimensions:** 43L x 40W x 15H centimetres
- **Purification method:** Sand
- **Special feature:** Tankless

## Images

![US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + CTO (Newest Version) - Image 1](https://m.media-amazon.com/images/I/713QljolxML.jpg)

## Questions & Answers

**Q: Does this system require electricity to operate?**
A: No, the US31 under-sink water filtration system does not require electricity. It works on water pressure alone.

**Q: How much water pressure is required for it to work?**
A: The feed water pressure should be: 30-70 psi

**Q: How long do the filters last before needing replacement?**
A: The filters should be replaced every 6 to 12 months, depending on usage and water quality. This ensures optimal performance and water quality.

**Q: Will it reduce TDS?**
A: No, this under-sink water filtration system does not reduce TDS levels. Instead, it maintains the TDS of the incoming water, preserving essential minerals. If TDS reduction is necessary, we recommend considering an iSpring reverse osmosis system.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Buy These
*by M***E on 30 May 2025*

I have a pond and to reduce the heavy metals when topping up I use these in my filtration , does the job good quality and the value for money means I can change my filters more often than recommended , easy to use quick delivery 😀😀😀

### ⭐⭐⭐⭐⭐ Excellent - easy to fit and much better tasting water. Great customer service too!
*by B***S on 2 June 2025*

I'm really pleased with it! After a few days for the tiny bubbles (which made the water look cloudly at first) the water is noticeably improved over our tap water supply and it's now my go-to source for drinking water. No more expensive bottled water, no more plastic waste! So good I bought a second one for our office. There was a small broken connector when it arrived but I'm still giving 5 stars as the customer service was excellent and they got me a replacement part very quickly

### ⭐⭐⭐⭐⭐ It wouldn't hurt to try it for 1 year. Might be surprised
*by B***N on 8 December 2025*

No problems with my first set, no problems with my second set all works well. Glass on the left old filter water, glass on the right new filtered water. Without send ending the water to a laboratory for testing i cant say 100% whats been cleaned out. But the orange specs i think is iorn and the black filter who knows but there is a difference with using filters.

## Frequently Bought Together

- iSpring US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + Carbon
- iSpring F7-GAC NSF Certified 1-Year Replacement Filter Cartridge Pack, 7-Count for Standard 5-Stage Reverse Osmosis (RO) Systems
- iSpring FA15 Alkaline Inline Water Filter Cartridge, 10” x 2” with 1/4” Quick Connect, NSF Certified, Add-on for RO Systems, Balances pH & Restores Minerals, 3-Layer Replacement Filter

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-04*