KOVIET Reverse Osmosis System, 10-Stage 600 GPD Tankless Reverse Osmosis Water Filter, Under Sink RO Water Filtration System with Smart LED Faucet, NSF/ANSI 42 & 58 Certified, 3:1 Pure to Drain

Easy to install. Took about 1 hour. I did drill the hole in my quartz countertop. That took some time and patience. It is better to take your time drilling. Use a diamond bit and start your hole at a 45 degree angle. This prevents the bit from sliding on your counter top and scratching it. Once the drill advances into the countertop you can move the bit to 90 degrees and complete your hole. Use some water. The bit gets extremely hot. My water was boiling and I paused to allow the bit to cool before completing the hole. The saddle for the drain connection was easy to complete as was the cold water supply hook up. The color coded lines make the installation easy. The push and pull connections are also easy to complete. It takes up a lot less space under my sink due to it being a tankless system. I love the fact that I can choose from filtered water or use RO water. A real time TDS display shows water quality when the RO water is being used. It runs quiet and produces water quickly in both filtered and RO modes. I would definitely buy this item again. 👍🏻👍🏻👍🏻

This filter has worked good and the water tastes amazing but now it's time to replace the filter and I can't find a replacement anywhere. A total waste of money for a single use RO system.

I have bad water quality in our neighborhood, but this system provides all our drinking and cooking water. It stays neat under the sink, and replacing the filter is incredibly easy. Very convenient for everyday use.

I initially had an issue with my unit's RO cartridge, but the customer service person replaced my unit quickly, and I'm completely happy again. Thank you!

I was excited to get this machine. It was working fine at first, said TDS was 18, and the little TDS meters I have said the same. Then went to 13, I was excited. But when I checked with my TDS meters, it was like 230. So that was a big disappointment. I reached out to the company. No problem, they sent a new machine. Now it reads 23, and the little TDS meters I have, said about the same. Now I used it for maybe a month, month and a half, I tried with my TDS meters, and it is now like 180-220. Disappointing is not even the right word. I cannot keep getting these machines installed, and get a handyman to take it out and back on. I honestly wanted it to work. Also, 23 and 18 was more than the TDS I wanted to begin with but false readings?... that is not okay. I really wanted it to work, as it is otherwise so good, long life filters, looks great, uses very little space. But if it is not filtering, what is the point? UPDATE 10/29/2025 I contacted customer care on the above issue and they sent me a new machine. I started seeing the same issue of display not matching, I contacted their support and they advised me to let it run for a bit since it is maybe the older water in the system making it read wrong and to my surprise, that was it! The machine said 13 and my TDS meter agreed with it. So moral of the story is, you have to wait like 2 minutes (which is a big waste of time and water), but you do get the number on display. So I am now happy that I am now finally getting the good quality water I bought this machine for. And it actually does taste really good too! :)

My water tastes good better than filtered store water bottles and installation was easy. Hope filters last as advertised.

Do not buy. I bought it a year ago and haven't been able to get new filters. Non nowhere. Do not buy . The overall machine works great. But no good if you can't buy replacement filters.

I love my machine, very affordable, water taste great.