--- product_id: 271569429 title: "Reverse Osmosis Water Filtration System Under Sink Water Filter 5-Stage 100 GPD Plus Extra Set of 4 Filters Free (FS-RO-100G-A)" brand: "fs-tfc" price: "฿34220" currency: THB in_stock: true reviews_count: 5 category: "Fs Tfc" url: https://www.desertcart.co.th/products/271569429-reverse-osmosis-water-filtration-system-under-sink-water-filter-5 store_origin: TH region: Thailand --- # 100 GPD high flow rate Low 1:1 drain ratio DIY easy installation Reverse Osmosis Water Filtration System Under Sink Water Filter 5-Stage 100 GPD Plus Extra Set of 4 Filters Free (FS-RO-100G-A) **Brand:** fs-tfc **Price:** ฿34220 **Availability:** ✅ In Stock ## Summary > 💧 Drink Pure, Live Smart — Your Kitchen’s Ultimate Water Upgrade! ## Quick Answers - **What is this?** Reverse Osmosis Water Filtration System Under Sink Water Filter 5-Stage 100 GPD Plus Extra Set of 4 Filters Free (FS-RO-100G-A) by fs-tfc - **How much does it cost?** ฿34220 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/271569429-reverse-osmosis-water-filtration-system-under-sink-water-filter-5) ## 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 - • **Pure Powerhouse:** Removes 99.999% of 1000+ contaminants including fluoride, lead & arsenic for crystal-clear water. - • **DIY Friendly Setup:** Quick-connect fittings and clear instructions mean zero plumber fees and instant hydration upgrade. - • **Eco & Wallet Smart:** Operates without electricity and a 1:1 low drain ratio saves water and cuts costs to just $50/year. - • **Bonus Filters Included:** Extra set of 4 filters ensures uninterrupted pure water and peace of mind for years to come. - • **Fast Flow, Compact Fit:** Delivers 18L/hour (1 cup in 5 seconds) with a sleek under-sink design perfect for modern kitchens. ## Overview The FS-TFC Reverse Osmosis Water Filtration System is a premium 5-stage under-sink filter delivering up to 100 gallons per day of contaminant-free water. Designed for easy DIY installation, it removes 99.999% of harmful substances including chlorine, fluoride, lead, and heavy metals. Its compact, high-flow design fits seamlessly in kitchens, offices, or RVs, providing fresh, great-tasting water quickly without electricity. With a low 1:1 wastewater ratio and an included extra filter set, it offers an eco-friendly, cost-effective solution backed by a 2-year warranty and lifetime support. ## Description FS-TFC Reverse Osmosis Water Filtration System is unequaled in quality, safety, and durability. The system incorporates 5µm PP filter, GAC filter, 1µm PP filter, RO membrane and T33 to provide unlimited pure, fresh and great crisp tasting water for drinking, cooking and making delicious coffee and tea. This 5-stage water filter system is made from high caliber components to offer exceptional contaminant rejection rates and long-lasting reliable performance. Guaranteed to remove up to 99% of all contaminants, such as chlorine, taste, odor, toxic fluoride, arsenic, lead, and chromium. This efficient and productive RO system will provide your family with trouble-free, high quality drinking water for many years. All fittings are used quick connectors, you can install this system easily and quickly follow user manual. Review: I got tired of drinking bottled spring water which I doubted the source! So, I invested in one of these filters knowing that it has been filtered in my very own home. The water comes out fresh, crisp and clean! I did the 6-month filter change and let me tell you the number of substances that are filtered is amazing! In the first picture you can see the new filter compared to the old filter. I poured the water into the cup to get a better look at it. By the time the water goes through the remaining 4 stages and reaches the tap, the water is crystal clear and fresh. I highly recommend it if you are looking to improve your water quality and remove harmful contaminants. Review: 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. ## 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 d 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 | |---------------|-------| | ASIN | B07F71QR5L | | Brand | FS-TFC | | Capacity | 100 Gallons | | Color | White | | Customer Reviews | 4.2 4.2 out of 5 stars (1,559) | | Date First Available | 28 August 2018 | | Item Weight | 5.9 Kilograms | | Material | Food Grade Material System,Stainless Steel Faucet | | Model Number | FS-RO-100G-A | | Product Dimensions | 29.21 x 12.7 x 29.21 cm; 5.9 kg | | Special Features | Reduce TDS | ## Product Details - **Brand:** FS-TFC - **Capacity:** 100 Gallons - **Material:** Food Grade Material System,Stainless Steel Faucet - **Product dimensions:** 29.2L x 12.7W x 29.2H centimeters - **Special features:** Reduce TDS ## Images ![Reverse Osmosis Water Filtration System Under Sink Water Filter 5-Stage 100 GPD Plus Extra Set of 4 Filters 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 ### ⭐⭐⭐⭐⭐ Review *by Z***H on 8 August 2023* I got tired of drinking bottled spring water which I doubted the source! So, I invested in one of these filters knowing that it has been filtered in my very own home. The water comes out fresh, crisp and clean! I did the 6-month filter change and let me tell you the number of substances that are filtered is amazing! In the first picture you can see the new filter compared to the old filter. I poured the water into the cup to get a better look at it. By the time the water goes through the remaining 4 stages and reaches the tap, the water is crystal clear and fresh. I highly recommend it if you are looking to improve your water quality and remove harmful contaminants. ### ⭐⭐⭐⭐⭐ Review *by T***K on 8 November 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. ### ⭐⭐⭐⭐⭐ Review *by R***N on 22 October 2021* We purchased this unit, wondering if it was going to give us better water. We have a well and a water softener and my wife didn't love the taste of the water and I didn't like to use the water softener for working with plants. Our configuration was to just run the RO to the refrigerator so we didn't use the faucet. The start of this story was not super, but after the outstanding customer support I was able to install and had great tasting water. It did the job we were looking for it to do. 5 start rating for unit and customer service. More details: What I loved about this unit is that it had literally everything I needed to put it in. I have to say, this is the first time I've used the quick connect and it was intimidating and worrisome. But after using it and learning that you just have to push the outside ring inwards to get the pipe out and the little blue c rings keep that ring out, thus not allowing the plastic pipe to come out unwanted, I was relived. And they are so easy to work with, it is almost embarrasingly easy! The seller ships the unit with a pretty much plug and play manner, but also includes extras like water line, multiple quick connect adapters, the valve you can use and the sink faucet. Even Teflon tape. As with most instructions, reading them made the installation easier. Even the diagram on the instructions to take off the pipe would have saved me watching youtube videos on the topic. To install, you basically have to connect 4 lines to/from the unit. IN, OUT, DRAIN and TANK. I installed it in phases by connecting a 1/4" plastic pipe to the quick connect, into a 1gal water container. * starting at the line going into the pressure regulator - making sure water was coming from the line * out of the regulator * out of the unit * final configuration before connecting it to my refrigerator Bottom line is this worked great and I am very pleased. One thing to remember with the RO systems. The water goes through a bunch of filtration and then goes through a membrane, and the pressure is controlled by a pressure valve. Therefore, if you run the water directly through the RO, the water doesn't run fast. it took about 7 minutes to fill 12 cups of water when I first connected it up. About 30 minutes later, the 12 cups took less than a minute....more... Once the system is in its final state and if you leave it be for 15 minutes or so, the water comes out of the faucet (in my case refrigerator) like you'd expect. This is caused by that water tank that comes with the unit. ## 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 - 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/271569429-reverse-osmosis-water-filtration-system-under-sink-water-filter-5](https://www.desertcart.co.th/products/271569429-reverse-osmosis-water-filtration-system-under-sink-water-filter-5) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-26*