---
product_id: 75727762
title: "FS-TFC 5-Stage Reverse Osmosis Water Filtration System 100GPD Fast Flow Plus Extra 4 Filter for Free (FS-RO-100G-A)"
brand: "fs-tfc"
price: "2751 kr"
currency: DKK
in_stock: true
reviews_count: 8
category: "Fs Tfc"
url: https://www.desertcart.dk/products/75727762-fs-tfc-5-stage-reverse-osmosis-water-filtration-system-100gpd
store_origin: DK
region: Denmark
---

# 100 GPD ultra-fast flow DIY easy install kit 99.999% contaminant removal FS-TFC 5-Stage Reverse Osmosis Water Filtration System 100GPD Fast Flow Plus Extra 4 Filter for Free (FS-RO-100G-A)

**Brand:** fs-tfc
**Price:** 2751 kr
**Availability:** ✅ In Stock

## Summary

> 💧 Drink Pure, Live Smart — The Ultimate 5-Stage RO Experience

## Quick Answers

- **What is this?** FS-TFC 5-Stage Reverse Osmosis Water Filtration System 100GPD Fast Flow Plus Extra 4 Filter for Free (FS-RO-100G-A) by fs-tfc
- **How much does it cost?** 2751 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/75727762-fs-tfc-5-stage-reverse-osmosis-water-filtration-system-100gpd)

## Best For

- fs-tfc enthusiasts

## Why This Product

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

## Key Features

- • **Smart Savings:** Operates without electricity and low water waste ratio keeps your bills low and eco-friendly.
- • **Health Guardian:** Removes 1,000+ contaminants including lead, fluoride, arsenic, and VOCs for peace of mind.
- • **Pure Powerhouse:** Delivers up to 100 gallons of crystal-clear water daily—never run dry again.
- • **Compact Yet Mighty:** Space-saving design fits snugly under any standard sink or in tight apartments.
- • **Plug & Play Perfection:** Effortless DIY installation with all parts and clear guides included—no plumber needed.

## Overview

The FS-TFC 5-Stage Reverse Osmosis Water Filtration System delivers up to 100 gallons per day of ultra-purified water by removing over 99.999% of contaminants including heavy metals, fluoride, chlorine, and VOCs. Designed for compact spaces, it features a fast 18L/hour flow rate, easy DIY installation with all necessary parts and tools, and a durable stainless steel faucet. Its energy-free operation and 1:1 water waste ratio make it cost-effective and eco-conscious, perfect for health-focused households and professionals seeking premium water quality without hassle.

## Description

Product description FS-TFC Reverse Osmosis Water Filtration System Under Sink Water Filter 5-Stage 100 GPD Plus Extra Set of 4 Filters (FS-RO-100G-A) Enjoy Fresh, Pure Drinking Water with FS-TFC Brand 5-stage Reverse Osmosis Filter System FS-RO-100G-A FS-RO-100G-A will provide unlimited pure, fresh and great tasting water for drinking, cooking and making coffee, tea and ice. Its good mate for Aquarium and fish tank also .This water system uses food-grade components to provide stable purifying performance and long-lasting life time. This is 2 X 50GPD capacity RO system will provide your family with trouble-free, high quality drinking water from now on. Packing list 1. RO sytem main body (filter pre Installed inside ) 2. stainless steel faucet 304 grade . 3. water pressure control valve (in case of water hammer) 4. Inlet ball valve with adaptor 5. 3.2Gallon water tank ,extra 1/4" tube 8M 6. drain saddle valve 7. seal tape and some quick fitting for DIY extention 8. User manual book . reverse osmosis membrane technology,Best support for Drinking water solutions MINI system for small Sink Suit for undersink,especially mini Appartment etc .Its save space without performance discounted . DIY Extend to Fish tank Etc Availiable for DIY and link to FIsh tank,Aquatic ,Aquarium etc . Its help water rotation ,make fresh water , can also work with Additional DI Kit for highly purified water Free clean water to Fridge FS-TFC products including Ice maker line kit ,Asin:B074R9PRJY.FS-TFC Ice Maker Installation Kit and Fridge Water Line Connection for Reverse Osmosis Systems, Refrigerator and Water Filters Spare parts and manual guide Good water quality from Ro membrane Equiped with Reverse osmosis membrane - system can , remove up to 99% of 1,000+contaminants. 100Gallon water per day capacity 100GPD inline RO membrane have water output 100gallon per day maximum.100GPD =378.5Liter .Enough for 4-6 person family use . Ro water Vs Drain water Ratio 100GPD (260ml minmum ) purewater flow with 300CC flow restrictor, pure waste water ratio 1:1 .Note: water pressure should be 4kg/cm²(60psi) around orabove RO system Installation and Filter Replacement Filter replacement Asin: B07C8KQ8DP we are best choice for 5 Stage RO system.Its highly Cost effective.Filters 1-5 already pre installed .Extra set for 12Month use along with Ro system wrench provide for 1-3 stage Filter cartridge replacement .Pls take care of the drections during 4-5 stage RO membrane/T33 replacement . All filter spare parts ready for installation We think too much and put all parts inside except Our worker .Pls check it according to Packing list . Feed water valve /RO tank /Pipe and Fitting connection Introduction 3/8" Feed water valve with two Adaptor some times our kitchen have different of Feed water valce , we provide adaptor for extend from 3/8'' to 1/2" specification . its need some teflon tapes to prevent leakage while u assembly adaptors . How to Fix & release Fitting ? 3.2 plastic water storage tank, plus food grade tubing and Fitting parts to provide safe, contamination-free pure water.All quick fitting 1/4" inlet &outlet .If some leakage happen,pls discharge and Re-Fix it .Note: cut Pipe Smoothly without shape change and Push to bottom. SUS 304 stainless steel Faucet & Drain Saddle Supreme quality material - system comes with 100% lead-free stainless steel faucet, we have longer screw to match different sink,No matter it thick or thin .Wall mounted mode also for optional with L bracket inside .

Review: Crystal-Clear Water with Easy Setup - I installed the FS-TFC 5-Stage Reverse Osmosis System under my kitchen sink, and the results have been outstanding. The water tastes noticeably better — no chlorine smell, no metallic aftertaste — just clean, refreshing water perfect for drinking, cooking, and even brewing coffee. Setup was surprisingly simple. The instructions were clear, and I didn’t need professional help. The compact design fits easily under the sink, and the 100GPD fast flow rate means I never run out of filtered water. I also appreciate the extra set of filters included — a thoughtful touch that saves money down the line. The system removes up to 99% of contaminants, including fluoride, lead, arsenic, and heavy metals. The wastewater ratio is about 3:1, which is standard for RO systems, and the filters last 6–12 months depending on usage. If you’re looking for a reliable, affordable reverse osmosis system that doesn’t take up much space and delivers excellent water quality, this one’s a winner.
Review: Amazing water; Easy to install - I’m not often this impressed, but I gotta say I AM with this under-sink RO system! I bought a house in the country thats on well water, and while the water tested great, its hard water with a lot of calcium in it. The calcium deposits leave behind a a grainy/crystalized powder that ruined a Kurg coffee maker and an Ice Maker and we also discovered that my wife has a sensitivity to the heavy calcium and it has caused some health issues for her. I priced out a whole home system, but thats out of my budget. I discovered these under-sink systems that I can install myself and were WAY more affordable. I chose this system because it was the most compact 5 stage RO system I could find. This kitchen hasen’t been remodeled since the early 90’s and i have limited space under the sink. Installation was EASY, took less then 2 hours, and the kit contained everything needed (except for a few basic hand tools; drill, crescent wrench, and a few wood screws). After turning the water back on and checking for leaks (none) it took about 2 hours for the system to fully fill up (my well is set to 45/80 psi), then a quick system flush…. And now we have beautiful, clean, healthy RO water, and it tastes Great! Good for my appliances and healthier for my wife. Home Run! All from a kit for under $150.00 AND it came with a set of replacement filters to!

## Features

- Supreme quality - designed, and assembled to guarantee water safety & your health.Remove Rate up to 99.999%，including chlorine, taste, odor, VOCs, as well as toxic fluoride, arsenic, lead, nitrates, heavy metals and 1000+ contaminants.Experience clean, safe, good-tasting water every time you turn on the faucet. Enjoy crystal clear ice cubes, fresher tea and coffee, better tasting foods, healthier baby formula – even better than most bottled water.
- Mini Size -High Flow Designed :Developed for household and commercial use, This Water Filtration System can be installed in your kitchen, bathroom, RV, or office .The tested full flow rate is 18L per hour at 60 Psi,means you can get 1 cup (200ml) of pure,fresh and great tasting water in 5 seconds.Completely satisfied with your daily water needs.
- Easy, do-it-yourself installation, Fits under a standard kitchen sink, with all parts included and clear, well-organized instructions and videos. Don’t need waste money on professional installation. quick and easy-to-understand design means you can install and understand everything about your new water filtration system.
- Money-saving:The Reverse Osmosis System works without electricity and 1: 1 low drain ratio,thereby reducing the amount that you spend on electricity and water.On average, by spending only $50 per year (13 cents per day) for the filter replacement, you and your family can enjoy safe and clean water.
- Provides you the ultimate satisfaction and peace of mind with our lifetime support and 2 year manufacturer warranty with registration.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | FS-TFC |
| Capacity | 100 Gallons |
| Included Components | RO System, Faucet, Tank, Feedwater Adapter, Extra Tool and Filter Set |
| Material | Plastic, Stainless Steel |
| Product Dimensions | 11.5"L x 5"W x 11.5"H |
| Special Feature | Reduce TDS |

## Product Details

- **Brand:** FS-TFC
- **Capacity:** 100 Gallons
- **Included Components:** RO System, Faucet, Tank, Feedwater Adapter, Extra Tool and Filter Set
- **Installation Type:** Under Sink
- **Material:** Plastic, Stainless Steel
- **Package Information:** Bottle
- **Power Source:** Ac
- **Product Dimensions:** 11.5"L x 5"W x 11.5"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Reduce TDS

## Images

![FS-TFC 5-Stage Reverse Osmosis Water Filtration System 100GPD Fast Flow Plus Extra 4 Filter for Free (FS-RO-100G-A) - Image 1](https://m.media-amazon.com/images/I/610HbldY8LL.jpg)

## Questions & Answers

**Q: Installed all new filters. no water flowing from ro filter clean side. continuous flow to drain. was working good for 6 months. what is the cause?**
A: Hi Chris , you may have to change the filter. I had the same problem here because of a lot of calcification ,poor water quality so to prevent  short filter life I install a pre filter before the reverse osmosis unit.  hope that be of help to you.

**Q: Does this unit come with a auto shut off valve?**
A: No! The main input line does not have a high-flow auto shutoff. The line is controlled by a manual shutoff from the pre-existing cold water line.

**Q: Where can i find the replacement filter ?**
A: If not Amazon, try Home Depot. That is where we found our original filter. This Amazon one was a replacement for that one, which cost the same as the original, but came with a set of replacement filters! Same price, for a far better deal.

**Q: Can this be switched between treated and untreated? I only need drinking and cooking water to be treated.**
A: No.   This is a separate (included) faucet that provides the filtered water.   Your normal sink faucet will continue to work as it is now.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Crystal-Clear Water with Easy Setup
*by T***K on November 8, 2025*

I installed the FS-TFC 5-Stage Reverse Osmosis System under my kitchen sink, and the results have been outstanding. The water tastes noticeably better — no chlorine smell, no metallic aftertaste — just clean, refreshing water perfect for drinking, cooking, and even brewing coffee. Setup was surprisingly simple. The instructions were clear, and I didn’t need professional help. The compact design fits easily under the sink, and the 100GPD fast flow rate means I never run out of filtered water. I also appreciate the extra set of filters included — a thoughtful touch that saves money down the line. The system removes up to 99% of contaminants, including fluoride, lead, arsenic, and heavy metals. The wastewater ratio is about 3:1, which is standard for RO systems, and the filters last 6–12 months depending on usage. If you’re looking for a reliable, affordable reverse osmosis system that doesn’t take up much space and delivers excellent water quality, this one’s a winner.

### ⭐⭐⭐⭐⭐ Amazing water; Easy to install
*by M***N on June 24, 2024*

I’m not often this impressed, but I gotta say I AM with this under-sink RO system! I bought a house in the country thats on well water, and while the water tested great, its hard water with a lot of calcium in it. The calcium deposits leave behind a a grainy/crystalized powder that ruined a Kurg coffee maker and an Ice Maker and we also discovered that my wife has a sensitivity to the heavy calcium and it has caused some health issues for her. I priced out a whole home system, but thats out of my budget. I discovered these under-sink systems that I can install myself and were WAY more affordable. I chose this system because it was the most compact 5 stage RO system I could find. This kitchen hasen’t been remodeled since the early 90’s and i have limited space under the sink. Installation was EASY, took less then 2 hours, and the kit contained everything needed (except for a few basic hand tools; drill, crescent wrench, and a few wood screws). After turning the water back on and checking for leaks (none) it took about 2 hours for the system to fully fill up (my well is set to 45/80 psi), then a quick system flush…. And now we have beautiful, clean, healthy RO water, and it tastes Great! Good for my appliances and healthier for my wife. Home Run! All from a kit for under $150.00 AND it came with a set of replacement filters to!

### ⭐⭐⭐⭐⭐ Very very pleased with this system RV installed with Kangen k8
*by M***T on June 15, 2022*

I was a bit skeptical of how this was going to work or even if it would. I am a commercial appliance installer and find my way around with pretty much everything and believe that patience is important on this installation. I wanted a machine that had enough water flow to not cause my Leveluk K8 machine to get the low water volume error and thought it was a bit of a gamble on achieving this. My RV sits currently at a site which has substantial water pressure which ranges from 75 to 90 pounds. At first I had an issue with getting the tank to fill but learned there was air trapped in the RO cylinder. This problem was resolved by leaning the assembly of filter to the right and to the left and you will here the air purge if such instance occurs. I have not tried using this with the 45 psi RV pump but will do so at some point. I believe that removing some air from an emptied tank down to 5psi would still allow filling tank. That would probably then take it much longer than the 45 minutes which it currently is taking to fill. I am currently able to fill the tank empty of water with an air pressure of 8 psi which gives great water flow once full of water. I also filled it with only 5 psi and was still able to achieve enough water flow to run the k8. There certainly is no issue with water flow volume and is more than plentiful to run water to gather nearly a gallon of kangen water but no more than. This is perfect IMO. The instructions says to drill a hole 1/2 inch for the faucet which is definitely much larger than needs to be. I went much smaller just to satisfy my OCD and the event that I wish to remove and plug hole at some time in the future. I doubt that will be the case though. I used a bit size 7/8 for the faucet and it was a perfect hole size. It has taken about 4 full tanks being flushed before the odd taste is removed. I also read that the drain water keeps running on some reviews though I am not having such an issue as I have been checking it often to the point that I am now confident that it is working with zero issues. Well done with an excellent price.

## Frequently Bought Together

- FS-TFC 5-Stage Reverse Osmosis Water Filtration System 100GPD Fast Flow Plus Extra 4 Filter for Free (FS-RO-100G-A)
- FS-TFC Reverse Osmosis Water Filtration System FS-RO-100G-A 1-Year Replacement Filter Kit,8 Pack
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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-28*