8 Stage Tankless Reverse Osmosis System NSF Certifed TDS Reduction 500GPD RO Water Filter System Under Sink Reverse Osmosis Water Filtration System for Home Kitchen Apartment (RMS-WP-RO500)

The Reinmoson RMS-WP-RO500 RO Water filtration system ~ This tankless Reverse Osmosis filtration system is a superior product than most others on Amazon. There are many factors to check out when researching water filtration systems. Among them are: How many stages of filtration (This one has 8 stages), Is it NSF Certifed (Yes!), Does it remove TDS (Yes!), Size of fittings (This one has the bigger 3/8" fittings - which means ZERO reduction in water throughput that the 1/4" fitting will create), How long will the filters last/how many gallons of water do they filter (This unit has 2 that filter 1100 gallons each and 1 that filters 2200 gallons - Compare that to the other brands that only filter 600 gallons!), Yearly cost of filters (I expect around $75.00/Year - FAR LESS than many other systems that have to be replaced twice as often), Warranty period (5 YEARS! - compare that to 1 year warranties for most others), How big is the unit (It fits very well under my counter and is smaller than tank RO systems), Does it have a water storage tank (No!), etc. I could go on but do yourself a favor and compare this one to ALL other systems. Installation was quick and easy (especially due to the 3/8" fittings) and the water tastes clean and free of impurities. All necessary parts were included so all you'll need are your tools and a little time before you will have this system up-and-running quickly. I know this sounds like a commercial - and maybe I should be a company spokesperson & get paid (I am not!) - but this system is really great! I expect great things from it and so far I'm super happy with the product. I think you will be very happy too - especially when it's time to replace the filters half as often!!

I had been looking for a system that would be easier to service than the ones I had purchased before. It had to work on well water and wouldn't break the bank. I took a chance on this "Tankless" system and was more than surprised at how easy it was to install and ultimately how well it works. It took less time to install than to remove the old system! Once in, I was actually able to see how it was working via the PPM gauge on the front of the unit. It also tells you when you need to replace an individual filter, (there are three). No more using a stick-meter to test the water. Our pre-filter at the well pump doesn't do that! This system works great on well water. If you have city water, you're going to LOVE how it works on yours! My wife and I live up in the mountains of Colorado on a well. Over the years we have used all kinds of water filtering systems to augment the well pump filter for cooking, drinking and most important, COFFEE. All had the space-eating holding tanks under the counter and all worked adequately. All were similar in that they required messy removal of the old filters from their water-filled, hard to unscrew tubes and periodic sterilization of the osmosis chamber. Servicing the old systems was always a long, involved chore. The new unit comes with easy to follow instructions. The water tube feeds are all color-coded, larger diameter "cut and plug-in" types. Much easier to handle than the old small diameter screw-on attachments that required rummaging through the old toolbox for the right wrench. A few cuts on the new water tubes to fit length needed, push them into the color coded plug-ins, attach the excess water line to the house drain, plug the electric into the wall socket under the sink and DONE! Note: The system comes with a really nice counter-mount faucet in chrome. However, I used our already installed brushed bronze one at the Bosses' direction. (You married guys will know what I mean.) It took me about fifteen minutes to install the new unit. Heck, it took me THIRTY just to remove the old system and take it down to the trash! Now we get clean, great tasting water on demand, no sulfur smell, no leaks, no muss no fuss. The replacement filters snap in and out and have their own sensors to inform me when that is needed. AND those replacement filters are cheaper than any of the old ones we used on the former systems, I checked. To be clear, I NEVER write reviews of things, but this is a break-thru product that WORKS and (IMHO) is several cuts above anything I've bought previously. It saved me time and money. I have neither to spare. I was compelled to share my experience with others about it just in case you're like me and would rather spend the extra time it would have taken to re-install and service an old style system.... FISHING. Mack in the mountains.

So in my area the water is severely hard and full of caliche so filtering the tap water is a necessity if you want to drink it normally or use for cooking. I have a full home R+O system installed and now this and the taste of the water is even better with this set up installed. I am no plumber but this was a super easy set up. I ended up drilling a hole just large enough for the threaded side of the faucet to fit through the left side of my kitchen sink and because my current faucet set up was quick connect/compression i had to use a different set up than the supplied shut off valve. If I had the regular style faucet lines and valves it would have worked great. I already had power in the cabinet due to the disposal so had no issues there. I dont have a static water tester but between the kitchen faucet and this there is definitely a taste difference and a lighter feeling as the tap water feels heavy when drank. Flow is as described and there is no leaks to be found. Fits perfect in my cabinet and has a quality feel. Update: 5 months into this thing and now the water flow through it has turned into a slow trickle at best. Takes about 4 minutes to fill 1 measured cup of water. Water pressure to it measures 72psi, water into the house has a prefilter, RO full home filter and post filter before ever coming into this and still plugged. Now today all 3 filters randomly turned red and system started beeping. Unfortunately there are no real troubleshooting steps in the booklet that comes with it...

This system is so easy to install I had it in and working in about 20 mins!!!! The water quality is better than bottled by far. It fits perfectly under the sink in the kitchen, with plenty of room to replace the filters when needed.

I purchased this RO system because I wanted to not have to continually go to the local "Water Stand" for drinking and cooking water. I wanted a system that did not take up a lot of space but provided 8 levels of filtration. Also I wanted a system that provided more clean water than waste water and this systems 2.5:1 ratio was better than most other similar units. So I decided to give it a shot and the thing that impressed me most was the support from the seller. Almost immediately after my purchase they reached out to say that if I needed any help installing the product or additional adapters that were not included,to let them know. I was totally surprised and pleased but this level of support. It turns out my sink water connection was a different size than what was included in the system. I sent the seller a photo of the connection and two days later I had the correct fitting at my door! From then the install was easy. The directions are easy to follow and the unit worked flawlessly first time. And since purchase I have reached out to the seller a few times for general questions and have ALWAYS received an immediate reply. I tested the water output with a PPM/EC meter and it registered ZERO so I know it works as described. Hopefully the unit will continue to work as it is now and the only unknown will be filter life, but I believe that variable is dependent on my tap water source so it really doesn't reflect on the unit itself. I highly recommend this unit for a compact 8 stage RO system and the level of support from the seller is by FAR the best I have ever experienced in Amazon. - Update almost 1 year later - This is by FAR one of the best purchases I have made on Amazon. The unit continues to perform perfectly and is still running on the original set of filters. While I don't use the 500gpd it is capable of, I use it pretty heavily, and it works as well as the day I first connected it. I can't speak for the other reviewers that had issues with installation, but as I said in my original review, my install was pretty straightforward, and any questions, or needed to parts were immediately addressed by support. I wish all my Amazon purchases were as good as this.

I've had this system (RMS-WP-RO500) installed under my kitchen sink for over two years now, and it's been performing flawlessly every single day. No major issues, no leaks, and the water quality remains excellent. The most surprising part? I haven't even needed to replace the RO membrane yet after all this time—I've only swapped out the two pre-filters (sediment and carbon) once so far. That's impressive longevity for daily use in a household. Installation was straightforward—clear instructions, all the fittings and tubing were included, and it didn't take too long even for someone who's done a few under-sink projects before. It mounts neatly and takes up way less space than my old traditional tank-style RO unit. Flow rate isn't quite as fast as the old tank system (no instant pressurized storage), so filling a big pitcher or pot takes a little longer, but honestly, everything else is a big upgrade: Super compact design frees up cabinet space Built-in TDS display (which matches my separate handheld TDS meter spot-on—usually around 1 to 2 ppm) Quick-twist filter changes are a breeze—no mess, no tools needed Filter life reminders right on the unit are actually useful I still run a separate 7-stage RO unit for my aquarium (more specialized needs there), but for drinking, cooking, and general kitchen use, this is perfect. It's NSF certified, reduces TDS effectively, and gives me great-tasting water straight from the dedicated faucet. If you're looking for a reliable, low-maintenance, high-output tankless RO system for home or apartment use, this one has proven itself over the long haul. I'd buy it again without hesitation. 5 stars—highly recommended for anyone wanting modern, efficient under-sink filtration.

We recently installed the 8 Stage Tankless under-sink RO system, and it’s made a remarkable difference in the quality and taste of our water. Our water source is a well with very hard water, and prior to installing the RO system, we struggled with high levels of total dissolved solids (TDS) at 684 ppm. After installing this system, the TDS dropped all the way down to 22 ppm – a drastic improvement that we can really taste! The water now tastes clean and crisp, perfect for drinking and cooking. We no longer worry about the mineral buildup that used to affect our appliances and fixtures, and we’re even seeing less scale in our kettles and coffee makers. The installation was straightforward, and the system is compact enough to fit easily under the sink without taking up too much space. Overall, we’re very happy with this purchase – it was well worth it to have great-tasting, pure water right from our tap. Highly recommend for anyone dealing with hard water issues!!

Love the price of this product because of the price. But, beware, the feed water adapter provided is not the right size and it's crap! I had to find an angle stop that had dual connections and use the brass ferrule compression to fit the included 3/8" water line to feed this unit. Instead, purchase one of these: https://www.amazon.com/John-Guest-ASVPP2LF-Adapter-Connect/dp/B003YKF2JM?th=1 - it replaces your angle stop, provides the 3/8" connection to your faucet and also has a sharkbite connection for the hose that has a 1/4 turn on/off valve. This goes inline with your sink's water water supply. Also, if you need to feed a refrigerator line, get a sharkbite splitter to split the pure water line. This unit does not come with a splitter. If your refrigerator line is 1/4 inch then you will need a 3/8" to 1/4" sharkbite adapter. The provided faucet is stainless steel. So, I used my old faucet that matched the brushed nickel. As for installation, it was super easy with great instructions. Once I had the connections sorted out (multiple trips to Ace Hardware) the unit was up and running. Woop woop!! I highly recommend this unit!

Buyer beware do research , can’t get filters, waste of money

Se instaló fácil, pero no trae manual de funcionamiento