Stokk Tankless Reverse Osmosis System, 800 GPD Fast Flow Water Filter, 8 Stage RO System, 3:1 Pure to Drain, Under Sink Tankless RO System, Smart Faucet, Reduce PFAS, S2

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.

I felt compelled to leave a review since I personally wanted to see more verified purchasers reviewing this product who have had no contact with the seller like myself. The filter is EXACTLY as advertised which I am extremely pleased about, no surprises at all. Things to know: I can affirmatively say after running the system for 30-60 seconds I am getting a TDS of 8-12 ppm, tap into the system is 160 TDS, I bought a tester just to see for myself and I am well pleased! Tankless RO systems will equalize after sitting for a short while so you do need to run it for a minute to get no TDS creep/attain perfect water, this is not unique but should be known. I suggest filling containers for the fridge, this way its chilled and you can remineralize with celtic sea salt which I also recommend since this water becomes near distilled. Just add a pinch for electrolytes is a good idea for ANY reverse osmosis system without remineralization. Installation is extremely easy I don't understand why others had a problem. It took me 30 minutes, just be aware you will have to drill for the spout if you don't have a hole for it and also a drain hole (like ALL other RO systems - this should be obvious). I have no leaks at all so others with leaks complaining of parts quality either improperly installed (use the provided teflon tape!) or they have since upgraded to better connections I find to be solid build quality, no complaints. The speed of the 400 gpd is slow like others are mentioning, I am fine with the speed for the price but be aware of that. The filter is super quiet when running which is nice. I hope this review helps others in my position, looking for a review from an actual unpaid customer who is also a perfectionist and over researcher when it comes to this stuff! I'll try to keep this review updated if anything changes.

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!!

Installed the system in just under an hour. When I first turned it on the pure water port was leaking profusely. I pulled the tubing out and discovered that the o-ring inside the port was not seated properly. I re-seated the o-ring and reinstalled the tubing - no more leaks. After running the faucet for 30 minutes the TDS reading was 008. Some people complained that this system is noisy, but that is to be expected for any motor driven device inside a hollow space like a cabinet. The water tastes good and comes out much faster that the previous filter system. The instructions were very clear and easy to follow.

Improves water taste and easy to install.

We've been using the 8-Stage Tankless Reverse Osmosis Water Filter for a while now, and it's been a fantastic addition to our home. The water tastes incredibly pure and fresh, with no aftertaste whatsoever. It's such a pleasure to drink clean water straight from the tap, and it has significantly improved our overall hydration experience. The 8-stage filtration process ensures that the water is thoroughly purified, removing impurities and contaminants effectively. It's reassuring to know that the water we drink is free from potentially harmful substances, providing peace of mind for the whole family. The inclusion of multiple filtration stages, including carbon and sediment filters, along with the reverse osmosis membrane, ensures a high level of purification. One of the standout features of this system is its tankless design. This not only saves space but also means that the water is filtered on demand, ensuring freshness. We appreciate the sleek and compact design, which fits seamlessly under our kitchen sink without taking up much space.

It's great, easy install, only thing I didn't like they had a coupon in it for a free filter but expired last year May! I contacted the company but no response, also having a hard time to register the product ! Left a message for that too but no response so I'm a bit worried about the age of the unit as off the expired coupon.

I don’t write many product reviews but I had to for this RO system. By far was one of the easiest installations I have ever done. Easier for sure because I installed it on my laundry room sink but still so easy and fast. I got it installed in 30 minutes and the instructions were very simple. It filtered immediately and when it is running it’s very quiet. After the initial flushing of the system the water quality was perfect. I bought this system for aquarium water as the water where I live is very hard and takes multiple times to buffer to required balance. The water was perfect and ready to go without any additional adjustments needed. No issues with leaking or missing parts could not ask for a better experience so far. This is the first day so if my experience changes I will update my review.

Love this. So compact, quiet and the water quality seem good. Very easy to install too!

I have used it nearly 2 months now.Easy to install.Although it makes a little noise when it is on but I guess it is same as other brand also.Water quality is good!

Have had this unit just under a month and am loving the cost savings already! Our town water is awful for making coffee so this unit allows filtered tap water to be used without all the hard minerals and such!

Perfecto el tamaño y funcionamiento, apto para espacios reducidos, fácil instalación

Love it but I can’t find replacement filters. Any help?