---
product_id: 660430243
title: "Tankless Reverse Osmosis System, 800 GPD Fast Flow Water Filter, NSF/ANSI 58&42, 8 Stage RO System, 3:1 Pure to Drain, Under Sink Tankless RO System, Smart Faucet, Reduce PFAS, S2"
brand: "stokk"
price: "$560.88"
currency: USD
in_stock: true
reviews_count: 8
category: "Stokk"
url: https://www.desertcart.us/products/660430243-tankless-reverse-osmosis-system-800-gpd-fast-flow-water-filter
store_origin: US
region: United States of America
---

# 800 GPD ultra-fast flow 8-stage filtration removes 1000+ contaminants NSF/ANSI 58 & 42 certified purity Tankless Reverse Osmosis System, 800 GPD Fast Flow Water Filter, NSF/ANSI 58&42, 8 Stage RO System, 3:1 Pure to Drain, Under Sink Tankless RO System, Smart Faucet, Reduce PFAS, S2

**Brand:** stokk
**Price:** $560.88
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Tankless Reverse Osmosis System, 800 GPD Fast Flow Water Filter, NSF/ANSI 58&42, 8 Stage RO System, 3:1 Pure to Drain, Under Sink Tankless RO System, Smart Faucet, Reduce PFAS, S2 by stokk
- **How much does it cost?** $560.88 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/660430243-tankless-reverse-osmosis-system-800-gpd-fast-flow-water-filter)

## Best For

- stokk enthusiasts

## Why This Product

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

## Key Features

- • **Lightning-Fast Hydration:** Get pure water in just 5 seconds with an 800 GPD membrane—never wait to quench your thirst again.
- • **Certified Clean Confidence:** Backed by NSF/ANSI 58 & 42 and FCC certifications, ensuring your water is free from PFAS, PFOA, and 1000+ hidden toxins.
- • **Space-Savvy Tankless Design:** Save over 50% under-sink space with a sleek, tankless system that prevents recontamination and fits modern kitchens.
- • **Eco-Friendly Water Efficiency:** 3:1 pure to drain ratio saves up to 1200% more water than traditional RO systems, reducing waste and your footprint.
- • **Smart Faucet with Real-Time TDS Monitor:** Stay informed with a built-in TDS meter and filter life tracker—know exactly when to replace filters for peak performance.

## Overview

The Stokk Tankless Reverse Osmosis System S2 delivers ultra-fast 800 gallons per day of NSF/ANSI certified pure water through an advanced 8-stage filtration process. Its space-saving tankless design and smart faucet with real-time TDS monitoring provide convenience and peace of mind, while the efficient 3:1 pure-to-drain ratio drastically reduces water waste. Perfect for health-conscious professionals seeking premium water quality without compromise.

## Description

Product description Stokk Tankless Reverse Osmosis System Stokk RS2 Filter S2 800GPD RO System S1 Pro 600GPD RO System T1 Lite RO System

Review: Fantastic Long-Lasting System - We’ve had this for over a year now so I figured it was time for a review. This RO water system is amazing. It’s a good price, compact, easy to install, and quiet. Just make sure you have an electrical outlet under your sink. If not, you’ll have to drill a separate hole in your counter to plug it into one of the outlets there. You will also need a power drill for drilling a small hole to connect the drain line to your sink drain pipe, but otherwise they give you everything you need. Just follow the instructions and make sure you run it for 30 minutes after it’s all installed to flush the filters. It works great! We are a family of six (2 adults, 4 kids) and heavy water drinkers. I also make gallon pitchers of iced tea a couple of times a week with it. The PPC filter lasted a whole year before I had to change it, and the RO filter is still going after a year and 3 months. It’s a reverse osmosis system, so don’t expect it to have a ton of water pressure, but the flow rate is better than most systems. The water tastes good. Really, it doesn’t have much taste at all. That’s because it removes virtually everything from microplastics to contaminants to minerals. So if you’re worried about getting enough minerals, I would get some mineral drops to put in your cup. Overall, we love it.
Review: Well built - I am not new to under sink water filtration. I have been using them for years. This is my first tankless RO system. I replaced a frizzlife 3 filter water purification system with this Stokk RS1 400 gpd because I needed RO water for my humidifier. I have a matching drinking water faucet and sink faucet so I did not need the included RO faucet. The installation was a breeze as the only thing I needed to do was add a drain saddle connection. The creative water tube connections to this box was a cinch to use. Because of the RO membrane, water output will be slower than your average charcoal filter system, keep that in mind. Most will opt for the faster 600 gpd unit but if you dont want to replace your expensive membrane any more than a once a year, you should stick to the 400 gpd. I dont think the plastic cover on the front control panel is necessary at all. Its already hiding in a cabinet. Stokk does provide everything you need except a drill, 1/4" bit and phillips screw driver. You might also need a pair of kitchen shears to trim the tubing. The included thank you letter is a nice touch, talking about the company's start. Stokk cares about the environment and all the waste caused by water bottles. But looking at the filter cartridges they use, they are encased in some heavy duty plastic. Unlike others that I have used in the past, these do not seem to open allowing you to just remove the old filter and or RO membrane. (Confirmed by watching Stokk's filter replacement youtube video.). Which means excess waste in the landfill that will take decades to breakdown. I would like to see development in this area. Sure its super convenient but not green in the least and kinda makes me wonder if I bought the system. This company has US based support and is from Hong Kong. . Jin Fang Technology has 3 trademarks for Stokk that were filed in 2023. So despite being new to the scene their product is seriously well designed. Stokk S1 series filtration meets the following specifications and is certified by SGS, a global certifiacation company. Certs can be found on the Stokk support website. NSF/ANSI 42 Filters are certified to reduce aesthetic impurities such as chlorine and taste/odor. These can be point-of-use (under the sink, water pitcher, etc.) or point-of-entry (whole house) treatment systems. NSF/ANSI 58 Reverse osmosis systems incorporate a process that uses reverse pressure to force water through a semi-permeable membrane. Most reverse osmosis systems incorporate one or more additional filters on either side of the membrane. These systems reduce contaminants that are regulated by Health Canada and EPA. For those of you who dont read the included manuals, you can extend your 1 yr warranty for a 2nd year by scanning the QR code found in the last page if the book.

## Features

- NSF/ANSI 58 & 42 - Tested and certified by SGS against NSF/ANSI 58 & 42 American National Standard. Effectively eliminate the hidden risks of tap water. Also FCC Certified. Scan the QR for SGS online test report
- 8-STAGE FILTRATION - Stokk 8-stage 0.0001μm RO water filtration system effectively removes 1000+ contaminants by 99.99%, including TDS, PFOA, PFOS, fluorides, chlorides and more
- 800 GPD & 3:1 PURE TO DRAIN - Featured with upgraded 800GPD RO membrane, the reverse osmosis system tankless provides a fast water flow and delivers a cup of water in 5S. Never need long wait for pure water. With 3:1 pure to drain, Stokk S2 saves up to 1200% more water
- 24/7 INSTANT FRESH WATER - The water cycle timed flush feature ensures that your water remains pure, prevents sediment build-up, and extends the lifespan of your filter. No need to pour out the first two glasses of water due to high TDS for the first use of the day, no waiting, no waste
- SMART DISPLAY FAUCET - Visual TDS monitor tells you the quality of your filtered water, while the filter life tracker alerts you when it's time for a replacement. Enjoy pure, clean water with convenience and peace of mind
- TANKLESS DESIGN - Stokk tankless reverse osmosis system boasts a sleek, space-saving design. It saves over 50% of under-sink space and prevents recontamination, making it perfect for American kitchens. NOTE: An electrical outlet and drilling holes is required to operate it. Please measure your under sink space first(L18.11*W5.91*H14.84 IN)
- INTERGRATION DESIGN - The Stokk Tankless Reverse Osmosis Sink is breeze to installed while reducing leak risk. Filter cartridges have a twist-and-pull design and can be changed in less than 2 seconds.Save time and upgrade your kitchen today!
- USA-BASED SOLUTION & SUPPORT - Choose Stokk's world-class water filtration solutions and US-based customer support for an excellent purchasing experience and reliable after-sales support. If you're not satisfied with your purchase, do not hesitate to reach out to our after-sales team and water specialists for ongoing technical support

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D8J7V86X |
| Best Sellers Rank | #129,439 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #268 in Under-Sink & Countertop Filtration |
| Brand | Stokk |
| Brand Name | Stokk |
| Capacity | 800 Gallons |
| Container Type | Dispenser |
| Customer Reviews | 4.1 out of 5 stars 377 Reviews |
| Global Trade Identification Number | 04895260601366 |
| Included Components | RO Water System, Smart Faucet, CP,RO,TC filter, Power Adapter,PE Pipes*3,Spanner |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 18.11"L x 5.91"W x 14.92"H |
| Item Weight | 15.81 Kilograms |
| LowerTemperature Range | 41 Degrees Fahrenheit |
| Manufacture Year | 2021 |
| Manufacturer | JIN FANG TECHNOLOGY (HONG KONG) LIMITED Stokk |
| Material | 1.System cover: BPA-Free Food Grade Material 2.Smart Faucet: metal 3.RO System: reverse osmosis membrane & pp cotton Material 1.System cover: BPA-Free Food Grade Material 2.Smart Faucet: metal 3.RO System: reverse osmosis membrane & pp cotton See more |
| Material Type | 1.System cover: BPA-Free Food Grade Material 2.Smart Faucet: metal 3.RO System: reverse osmosis membrane & pp cotton |
| Maximum Flow Rate | 0.56 Gallons Per Minute |
| Model Name | S2 |
| Model Number | S2 |
| Other Special Features of the Product | Built In TDS Meter, Leak Proof, Reduce TDS, Self Cleaning, Tankless |
| Power Source | Corded Electric |
| Product Dimensions | 18.11"L x 5.91"W x 14.92"H |
| Purification Method | Activated Carbon, Reverse Osmosis |
| Special Feature | Built In TDS Meter, Leak Proof, Reduce TDS , Self Cleaning, Tankless |
| Supported Water TDS Level Maximum (PPM) | 2000 |
| Upper Temperature Rating | 100 Degrees Fahrenheit |

## Product Details

- **Brand:** Stokk
- **Capacity:** 800 Gallons
- **Included Components:** RO Water System, Smart Faucet, CP,RO,TC filter, Power Adapter,PE Pipes*3,Spanner
- **Installation Type:** Under Sink
- **Package Information:** Dispenser
- **Power Source:** Corded Electric
- **Product Dimensions:** 18.11"L x 5.91"W x 14.92"H
- **Purification Method:** Activated Carbon, Reverse Osmosis
- **Special Feature:** Built In TDS Meter, Leak Proof, Reduce TDS, Self Cleaning, Tankless

## Images

![Tankless Reverse Osmosis System, 800 GPD Fast Flow Water Filter, NSF/ANSI 58&42, 8 Stage RO System, 3:1 Pure to Drain, Under Sink Tankless RO System, Smart Faucet, Reduce PFAS, S2 - Image 1](https://m.media-amazon.com/images/I/61XWvM1OJxL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fantastic Long-Lasting System
*by M***W on August 20, 2025*

We’ve had this for over a year now so I figured it was time for a review. This RO water system is amazing. It’s a good price, compact, easy to install, and quiet. Just make sure you have an electrical outlet under your sink. If not, you’ll have to drill a separate hole in your counter to plug it into one of the outlets there. You will also need a power drill for drilling a small hole to connect the drain line to your sink drain pipe, but otherwise they give you everything you need. Just follow the instructions and make sure you run it for 30 minutes after it’s all installed to flush the filters. It works great! We are a family of six (2 adults, 4 kids) and heavy water drinkers. I also make gallon pitchers of iced tea a couple of times a week with it. The PPC filter lasted a whole year before I had to change it, and the RO filter is still going after a year and 3 months. It’s a reverse osmosis system, so don’t expect it to have a ton of water pressure, but the flow rate is better than most systems. The water tastes good. Really, it doesn’t have much taste at all. That’s because it removes virtually everything from microplastics to contaminants to minerals. So if you’re worried about getting enough minerals, I would get some mineral drops to put in your cup. Overall, we love it.

### ⭐⭐⭐⭐⭐ Well built
*by F***L on July 7, 2024*

I am not new to under sink water filtration. I have been using them for years. This is my first tankless RO system. I replaced a frizzlife 3 filter water purification system with this Stokk RS1 400 gpd because I needed RO water for my humidifier. I have a matching drinking water faucet and sink faucet so I did not need the included RO faucet. The installation was a breeze as the only thing I needed to do was add a drain saddle connection. The creative water tube connections to this box was a cinch to use. Because of the RO membrane, water output will be slower than your average charcoal filter system, keep that in mind. Most will opt for the faster 600 gpd unit but if you dont want to replace your expensive membrane any more than a once a year, you should stick to the 400 gpd. I dont think the plastic cover on the front control panel is necessary at all. Its already hiding in a cabinet. Stokk does provide everything you need except a drill, 1/4" bit and phillips screw driver. You might also need a pair of kitchen shears to trim the tubing. The included thank you letter is a nice touch, talking about the company's start. Stokk cares about the environment and all the waste caused by water bottles. But looking at the filter cartridges they use, they are encased in some heavy duty plastic. Unlike others that I have used in the past, these do not seem to open allowing you to just remove the old filter and or RO membrane. (Confirmed by watching Stokk's filter replacement youtube video.). Which means excess waste in the landfill that will take decades to breakdown. I would like to see development in this area. Sure its super convenient but not green in the least and kinda makes me wonder if I bought the system. This company has US based support and is from Hong Kong. . Jin Fang Technology has 3 trademarks for Stokk that were filed in 2023. So despite being new to the scene their product is seriously well designed. Stokk S1 series filtration meets the following specifications and is certified by SGS, a global certifiacation company. Certs can be found on the Stokk support website. NSF/ANSI 42 Filters are certified to reduce aesthetic impurities such as chlorine and taste/odor. These can be point-of-use (under the sink, water pitcher, etc.) or point-of-entry (whole house) treatment systems. NSF/ANSI 58 Reverse osmosis systems incorporate a process that uses reverse pressure to force water through a semi-permeable membrane. Most reverse osmosis systems incorporate one or more additional filters on either side of the membrane. These systems reduce contaminants that are regulated by Health Canada and EPA. For those of you who dont read the included manuals, you can extend your 1 yr warranty for a 2nd year by scanning the QR code found in the last page if the book.

### ⭐ Filters replacement cost more than the system!!
*by M***E on February 10, 2026*

At first the system works very well- until you need to change the filters. Stokk sells their filters for the same price as the whole system. I paid $200 for the system and the replacement filters are $170, if they’re even in stock. On top of that, you can only buy their filters, locking you into an expensive cycle. When I asked when they would restock their filters, I had to wait 4 months only for the prices to be outrageous. I would not recommend Stokk, do your research for other filter systems!!

## Frequently Bought Together

- Stokk Tankless Reverse Osmosis System, 800 GPD Fast Flow Water Filter, NSF/ANSI 58&42, 8 Stage RO System, 3:1 Pure to Drain, Under Sink Tankless RO System, Smart Faucet, Reduce PFAS, S2
- Waterdrop Remineralization Under Sink Water Filtration, 1/4” Quick Connect Post Filter for RO Reverse Osmosis Filter System, Restore Essential Minerals
- Malida 1/4 inch O.D. Length 32.8ft(10 meters) RO Water Tubing, Hose Pipe for RO Water purifiers System,+ 1/4 O.D quick connector 10pcs

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-18*