---
product_id: 469464712
title: "US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + Carbon"
brand: "ispring"
price: "€ 384.94"
currency: EUR
in_stock: true
category: "I Spring"
url: https://www.desertcart.pt/products/469464712-us31-classic-3-stage-under-sink-water-filtration-system-drinking
store_origin: PT
region: Portugal
---

# 20x faster 1 GPM flow rate 10,000-gallon ultra capacity patented above-counter installation US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + Carbon

**Brand:** ispring
**Price:** € 384.94
**Availability:** ✅ In Stock

## Summary

> 🚰 Elevate your hydration game with instant, pure water—because waiting is so last decade.

## Quick Answers

- **What is this?** US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + Carbon by ispring
- **How much does it cost?** € 384.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/469464712-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

- • **Instant Flow, Zero Wait:** Delivers 1 gallon per minute—20x faster than pitchers—perfect for busy kitchens and instant hydration.
- • **Elite NSF 58 Certified Purification:** Triple-stage filtration removes heavy metals, chlorine, sediment & odors for premium water safety.
- • **Sleek Design with Smart Transparency:** Brushed nickel faucet paired with a clear first-stage housing lets you monitor filter health at a glance.
- • **Effortless Above-Counter Installation:** Innovative top-mounted fastener means no more crawling under the sink—setup is quick and hassle-free.
- • **Long-Lasting 10,000-Gallon Filter Life:** Enjoy up to 12 months of crisp, clean water with minimal maintenance and fewer replacements.

## Overview

The iSpring US31 is a high-capacity, 3-stage under-sink water filtration system certified to NSF/ANSI 58 standards. It features a sediment filter plus dual carbon block filters that remove heavy metals, chlorine, and odors while preserving essential minerals for a fresh taste. With a 10,000-gallon filter life and a rapid 1 GPM flow rate, it delivers premium-quality water on demand. Its patented above-counter installation and transparent housing combine convenience with style, backed by U.S.-based expert support and a 1-year warranty.

## Description

This 3-stage filter 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 like chloramine, providing you with bottled quality water on demand.

## Features

- 【NSF 58 Standard Purification】 : Tested by independent third parties against NSF/ANSI 58 standards. The PP, GAC, and CTO triple-filtration stack removes heavy metals, chlorine, sediment, and odors for elite-level safety.
- 【10,000-Gallon Ultra Capacity】: Built for long-term performance with a filter life of up to 12 months. Enjoy high-quality water year-round with fewer replacements and lower maintenance costs.
- 【20x Faster Flow Rate】: Delivers an on-demand flow of 1 GPM—20 times faster than standard water pitchers. Perfect for instant drinking, washing produce, or filling large pots without the wait.
- 【Patented Above-Counter Installation】： No more struggling under the sink! The top-mounted fastener allows you to secure the faucet entirely from above the countertop, making installation fast and hassle-free.
- 【Smart Visibility & Premium Finish】： Features a high-quality brushed nickel faucet and a transparent 1st-stage housing, allowing for easy visual filter inspections at a glance.
- 【Fresh Mineral Taste】: Deeply purifies while retaining essential natural minerals. Delivers a crisp, refreshing taste similar to high-end bottled mineral water. (Note: Does not reduce TDS; for scale removal, choose iSpring RO systems).
- 【U.S.-Based Expert Support】: Includes a 1-year manufacturer warranty and lifetime technical support from our dedicated team in Atlanta, GA. Reliable quality and service you can trust.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07CHXVRS5 |
| Best Sellers Rank | #13,058 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #27 in Under-Sink Water Filters |
| Brand Name | iSpring |
| Capacity | 10000 gallons |
| Container Type | Cartridge |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,910) |
| Filter Life Cycle | 6 Months |
| Global Trade Identification Number | 00662425095681 |
| Included Components | housings, filters, parts and tubings, faucet and mounting bracket |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 40.6L x 15.2W x 40.6H centimeters |
| Item Type Name | 3-Stage Under Sink High Capacity Tankless Drinking Water Filtration System - Includes Sediment Filter and 2x CTO Carbon Block Filters (Newest Version) |
| Item Weight | 5.5 Kilograms |
| Manufacturer | iSpring Water Systems |
| Material Type | carbon block |
| Maximum Flow Rate | 1 Gallons Per Minute |
| Model Name | US31 |
| Model Number | US31 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Other Special Features of the Product | Chlorine, NSF certified, Tankless |
| Part Number | US31 |
| Power Source | Manual Operation |
| Purification Method | 3 Stage. Chemical Absorption and Mechanical Filtration |
| Supported Water TDS Level Maximum (PPM) | 300 |
| UPC | 662425095681 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 100 Degrees Fahrenheit |
| Warranty Description | 1 Year Manufacturer |

## Product Details

- **Brand:** iSpring
- **Capacity:** 10000 gallons
- **Material:** carbon block
- **Product dimensions:** 40.6L x 15.2W x 40.6H centimeters
- **Special features:** Chlorine, NSF certified, Tankless

## Images

![US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment + GAC + Carbon - Image 1](https://m.media-amazon.com/images/I/71NghDG4BjL.jpg)

## Available Options

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

## Questions & Answers

**Q: Under-sink 3-stage water filtration system, bacteria and virus protection.**
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.

## 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 Portugal*
*Store origin: PT*
*Last updated: 2026-10-17*