G3P600 Reverse Osmosis System, 600 GPD Tankless RO Water Filter | NSF/ANSI 42, 53, 58 & 372 Certified, 8-Stage RO Water Filtration System, 2:1 Pure to Drain, Smart LED Faucet, Reduce PFAS

I finally got tired of going down to the local water station and filling up 5 gallon water jugs and broke down and bought a water filtration system for under the cabinet. I will admit, I had a little trepidation because I don’t generally like dealing with plumbing, but the installation for this system was extremely easy, and the instructions are very accurate and easy to follow. This WATERDROP unit fit very nicely under our kitchen sink. I even added a small water pressure tank as well as a mineralization filter and it didn’t take up half the space under our sink. Some things to consider when installing the system on your own or any system for that matter. You’ll need to know where your main water shut off is or at least have the ability to shut the cold water off under your sink because you will be tying into the cold water line under your sink. You’ll need an electrical outlet to plug the unit into, and you should be able to use the same one your dishwasher uses providing you have a dishwasher or garbage disposal. And a basic knowledge of plumbing will help as well but not necessary because the instructions are so easy to follow. All in all, it took me about three hours to get this installed mainly because I had to go down to the store and buy another fitting to hook up the refrigerator. We’ve had ours installed for about a month and a half to two months now and I enjoy being able to get freshwater right next to the tap at the sink. The water taste great and the filtering system seems to work very well on this unit. One thing to keep in mind, the water does not flow as fast as a regular sink faucet flows so be prepared that it takes a little bit longer to fill a glass of water up or a pitcher for example. If you think this will be a problem for you do some research and get a unit that has a faster water output. This particular unit has the digital display on the front, which will tell you when your filters need to be replaced. The manual says the filters have to be replaced every 6 to 12 months depending on the filter, but that could be different in your area based on how hard or soft your water is. As you can see from the picture below, the unit itself fits nicely underneath the sink, but all of the 1/4 inch tubing does look messy and I still need to get in there and try to make it a little neater. The tubing is somewhat rigid, so it doesn’t just lay on the bottom of your cabinet and kind of goes where it wants to go, so you may have to come up with a way to hook it to the wall or gently zip tie them together to make it a little neater. Also, it may seem like all of those plastic connectors wouldn’t work well or might fail, but honestly, once you push the tubing into those connectors, I’ve had no leaks whatsoever. Everything is nice and tight and secure. Plus it has the little blue locking rings that you put around the end of each connector to hold the tubing inside them so don’t be worried about that. All in all this is an excellent purchase and I’m really glad we got it. Having clean tasting water right from the faucet or the refrigerator is so much better than filling up ten 5 gallon water jugs twice a month. Don’t let this project seem overwhelming to you, with a few tools and the ability to read the instructions you’ll have it installed in no time.

Several years ago, we upgraded our kitchen sink and added a water filter. After researching, we found the WaterDrop series with contained RO filters. The best part was its simple overall design. It’s a single unit with all the filters built-in, requiring only three connections to the water source and power. There’s no external pressure tank or tangled hose connections between components. Filters are easy to change with a simple twist to remove. We purchased a G3 unit, which worked well until we decided to upgrade for higher water flow. The G3 was rated at about 300-400 gallons per day. We then saw the WaterDrop G3P600 and felt it was an ideal upgrade since it used the same filters as our previous unit. We knew the RO filter would need replacing in a few months, so we waited until then to install the new unit. Swapping it out was very simple. In my opinion, the hardest part was installing the faucet. There’s rarely enough space behind the sink to reach up and work with the nuts that hold it in place. I completed the swap in about an hour, and everything was working fine—no leaks in the water lines. A few weeks later, my leak detector went off, and I noticed water under the unit. I contacted support since it was still under warranty. I emailed WaterDrop Customer Service, and Rosie C. responded. This prompted several follow-up emails to verify connections and other details. After trying various solutions, it became clear there was an internal leak and that a new or rebuilt unit was needed. Rosie then shipped a replacement unit to swap with the broken one. I waited for transportation and USPS, and the new unit arrived about a week later. Throughout the process, Rosie periodically checked in to see how things were going. As I write this, the unit has been running smoothly for about two weeks. I still inspect it daily and keep it on a sheet tray, just in case. I’ll probably keep it that way to catch any leaks early and avoid damage to the cabinet. In summary: I am very satisfied with the G3P600 and the support I received from WaterDrop in resolving the issue. I hope this unit lasts longer than the four years our original one served us. It’s a good product, offers excellent after-sales support, and is reasonably priced for clean water. Highly recommended for product value and support. Ed. Note: These are my personal opinions based on units I purchased. I have not been given a unit to test or reimbursed for my time.

This water system is great! This tankless design dispenses great-tasting water at your fingertips in seconds. The filters are amazingley easy to change with access in front of the machine. Also, we found it much easier to install than the system we were replacing it with. We had questions and concerns while setting it up due to our specific cabinet space configuration, and customer-service rep Doreen was quick to respond and offer help and advice. She truly seemed interested in keeping us satisfied with this product and with their service.

I just bought the G3P600. The installation was easy enough as long as you're agile enough to work under a kitchen sink. I have to say I was impressed with the engineering of the product and the installation directions were quite good. The little water supply valve is quite ingenious and allows you to install it on existing cold water valves of varying sizes with ease. The water supply valve has a very effective shut off valve for just the unit water supply independent of always having to shut off water supply to the whole unit. I just had to close the main valve long enough to attach their included water supply valve. I did have a small glitch in the installation however which I will describe so if anyone else runs into the same issue, it may be helpful for them to remedy. The instructions emphasize that when inserting the tubing into the back of the unit, to be sure to push them in to the receiver all the way up to the factory drawn marker line. By my measurement it is an about 7/8". My installation went very well right up to the point of inserting the tubing into the back of the unit. When I attempted to install the white supply water line, I could not get it to fully insert to save my life. (about a 1/4" short) Mistakenly I assumed that I had got it in far enough and it would be good enough. Not so. When I turned on the water supply and plugged in the unit. It ran for about 30 seconds and I got a lot of leaking coming from the white tubing area at the back of the unit. The other two tubes went in with no problem. I used a drop of dish soap on my fingers to lube the tube ends and they went in without a hitch. I called their customer service and he stated that the tubing had to go all the way down and he described the inner parts that hold the tubing. It was tough to get the tubing out even though it was in only partially. Their gripper mechanism works really well. To get the tubing out, one has to remove the little blue lock ring and use a very small screwdriver to lift out the white plastic outer ring (the gripper). Ultimately I had to take some needle nose pliers and pinch the tubing and wrench it out. The CS rep described to me that there a small black double O-ring down inside the receiver. I noticed that once the plastic gripper was removed that the double 0-ring seemed to be askew in the receiver. It apparently became dislodged from its proper place when I tried to insert the white tubing. The double o-ring is not two separate rings but a single unit with two 0-ring shapes apparently manufactured as one unit. I took it out and saw there is a small circular groove inside the receiver where the o-ring is supposed to sit. It took several tries but I managed to get the o-ring back in the proper place, reinserted to white plastic gripper, recut a fresh square tube end. This time I pre-lubed the end of the tubing and it went in all the way and seated properly. After that I turned the water back on and plugged in the unit and it worked perfectly with NO leaks. The moral of the story here is if you can't get the tubing to seat as they describe, DON'T assume you have a good seat on all the tubing and proceed to charge the unit. I think what happened to me is the o-ring became dislodged from its proper position and got underneath the tubing end and that is why I was never able to get it to fully insert; I was hitting the o-ring and there was never a proper seal. This was one tiny glitch in the whole installation for me. Otherwise it was quite simple and their included parts was all I needed to install the whole system, which is now working beautifully. MORAL, MAKE SURE ALL THREE TUBES ARE FULLY SEATED AT THE BACK OF THE UNIT OR FIND OUT THE REASON WHY BEFORE TURNING ON THE WATER AND PLUGGING IT IN. Still 5 stars on the quality and operation of the unit.

The water after filter is very soft, which can be seen on the faucet. It tastes just like bottled water. It is not hard to install the system. One big task is to drill a hole on the drainage pipe under the sink. Other tasks are smooth. I like it. It is 1:2 of good and waste so not that bad. Wish I can collect the waste water for my lawn. It is a fancy water filter system. The only reason I give it a 4 star is the cost of the filters. One thing to notice is, after it is newly installed, the water pour would flush out some carbon particles. Be careful not to drink it. After about 5 days, I stopped seeing those.

I really like this product. It was easy to install and seems like a high quality product. I have one for my kitchen sink which the unit fits perfectly under. I only had a problem with the install because how the water line coming in to my sink is setup. There was not a fitting with the unit that would work so I had to do some customization. Unfortunately while in the process I broke the water line and it was like a fire how spraying in my face. Luckily I knew where the water shutoff was on the outside of the home. Had to call a plumber to fix that water line. I did buy a second one and installed that myself for the refrigerator. It work out well. No more bottle water and micro plastics. I like how the faucet shows the quality of the water coming out. I have not had to replace the filters yet but seems they are lasting a fair amount of time. It is quiet too. The plumber said he got rid of his because it was too noisy. This has noise but not enough to bother us.

I am so incredibly happy with this - this has got to be the best purchase/investment of 2026. I moved to FL in 2023 and immediately noticed the water had an incredibly high sulfur smell...and not the best tasting. My family has spent hundred of dollars purchasing water bottles to drink and cook with. After going down the rabbit hole of reddit reviews, youtube comparisons, and other research - The Waterdrop g3p600 was my choice...and it was an excellent choice. Instructions were clear and set up took a while as I had to muster the courage to drill a small hole in the pipes and do some small replumbing, but, again, the kit came with everything needed for a successful installation. The unit is a hair larger than what I anticipated. The unit takes up all of the cabinet space as a result of the size AND the existing plumbing. I had to get a little creative as the power socket under my sink was controlled via a switch which gave power to my garbage disposal. I chose the route to have the disposal connect to an air switch (which is working perfectly). After all the initial set up - this was easily compatible with my existing set up. First usage the water was a little discolored for a fraction of a second..after everything worked just fine. The taste is refreshing and neutral and no more sulfur smell at all..not even a hint of it.

The Waterdrop G3P800 is a great water filter! It is a lot easier to install and takes up much less space then the tanked filter. The "800" not only delivers water faster than the G3P600, but also has a UV light to kill bacteria. And "Waterdrop's" customer service was excellent! I had a leak in the 2nd system I ordered and contacted Amazon for a replacement. After two months Amazon hadn't shipped the replacement. I contacted Waterdrop directly, spoke with Doreen, and my unit was quickly replaced with no issues! Excellent communication with Doreen! 😀 3 Stars for Amazon. 5 Stars for Waterdrop! If you have alot of money and want the best, look at Waterdrop's X12 or X16 models. But the G3P800 filters just as good and is cheaper.

Ottima qualità costruttiva del prodotto, si installa in autonomia in circa un' oretta. Dopo 3 settimane di utilizzo non ho riscontrato alcun problema Finalmente addio alle bottiglie di plastica!

First of all: installation and maintenance is very easy. Here in Surrey this filter gives me 15 TDS which is not perfect for aquarium. But the worst thing is that the TDS meter is a joke. I have my own TDS meter and it is in line with this build in for the most of the time, besides when filter needs to be replaced. Inbuilt TDs meter was showing 16 ppm, mine 300 - tap water is here arround 350! After exchanging the CF filter, AND flushing it was lower and lower TDS measured by my TDs meter, but the inbuilt was showing 15 all the time !!!! Moreover, I assume these filter change alarms are automatic - like programmed for a period of time .. :( I will buy a PROPER RO filter after moving to another house. This one is OK for drinking. Build quality 5/5, ease of use 5/5. Filtering 2/5. Overall 3/5. Not recommended for aquarium use.

Easy to install and works great. Had an issue after installation (our mistake) and customer service was incredibly responsive and helpful and even followed up to ensure it was corrected. Water is much cleaner and better tasting than with our old tank RO filter. Output is slower than with a tank, but not by much. Very happy with the unit!

bonjour très facile d'installation et tien peu de place le fonctionnement est bien bonne pression je le recommande salutations

“TDS Creep”, algo que deben saber todos los interesados en filtros de Ósmosis Inversa (RO), algo es natural y parte de la física de tales filtros. Excelente sistema, reducción a 2.7% de los TDS totales del agua de mi casa (740 ppm)… logrando de 18 a 25 ppm sin problema, muy por debajo de los 50’s mínimos recomendados para la salud ** (50-150 ppm) Mejor que los 5-15% que asegura Waterdrop en sus especificaciones Sin contar con el costo original del sistema… el costo por año es menor que el costo de comprar agua embotellada de “marcas conocidas”, y mejor calidad de agua que estas pues los 18 a 25 ppm que tengo son inferiores que los 60 a 80 ppm de dichos proveedores de agua, agua que suele tapar los filtros de los refrigeradores… no digo mas. El único inconveniente es el mencionado “TDS Creep”, efecto que sucede en las membranas de los filtros de Ósmosis Inversa… que sin flujo positivo (reposo, sin uso) el lado sucio se infiltra al lado limpio del sistema, ocasionando que el primer flujo de agua limpia luego de horas de descanso tenga una cantidad muy grande de TDS (140 ppm en mi caso). En sistemas con tanque esto no se sufre tanto pues el agua sucia (salmuera) se diluye con la previamente filtrada en el tanque… pero en sistemas sin tanque esto no es el caso, y la única manera de corregir es lavar el flujo por algunos segundos (30-40s en mi caso) para obtener agua realmente pura. Nota: mi sistema venia empacado con los filtros por separado… y aun así luego de semanas de uso el filtro RO fugó agua, filtrándose a través del chasis del sistema hasta el piso donde esta instalado… y para variar se corrigió quitando el filtro y volviéndolo a instalar. Mi hogar recibe agua de 740 ppm, y mi sistema hidráulico provee 50 a 65 psi de presión, para buenas o malas estas variables cuentan