Express Water RO5DX Reverse Osmosis Filtration NSF Certified 5 Stage RO System with Faucet and Tank – 50 GPD, 14 x 15 x 5,

(10 customer reviews)


  • Product 1: Reverse Osmosis Water Filter: Experience what water should taste like with the Express Water reverse osmosis water filtration system reducing up to 99.99% of Lead, Chlorine, Fluoride, Nitrates, Calcium, Arsenic, and more.
  • Product 1: Water Purification System: Drink the healthiest water on Earth. All our water filters are specially engineered to work together, producing the safest and best tasting water you’ll ever drink
  • Product 1: Under Sink Water Filter: Don’t waste money on professional installation. Express Water’s quick and easy-to-understand design means you can install and understand everything about your new water filtration system
  • Product 1: Under Sink Water Filter System: No need to mess with refilling or activating your water filter, Express Water’s water filtration systems automatically fill your water tank with high quality drinking water
  • Product 2: Reverse Osmosis Replacement Water Filters: Experience what water should taste like with the Express Water reverse osmosis water filtration system reducing up to 99.99% impurities.
  • Product 2: Reverse Osmosis Filter Replacement Set: Each Express Water replacement filter is specially designed to work together and compliment each other. Get the cleanest water and the best value in your filtration
  • Product 2: Pre-Carbon Filter: Activated Carbon Block and Granular Activated Carbon block water filters protect your system from chlorine damage and reduce volatile organic chemicals.


Express Water RO5DX Reverse Osmosis Filtration NSF Certified 5 Stage RO System with Faucet and Tank – Under Sink Water Plus 4 Filters – 50 GPD, 14 x 15 x 5, White
Make the purest water with your own home reverse osmosis system. Great in the kitchen: improve the taste of your cooking, coffee, ice, and drinks. experience true reverse osmosis water. Get setup fast with our quick connect tubing system. Includes fast flow faucet with 0.8 gpm delivery. a compact water filter for sink made to fit under counter in a cabinet. Best for house, apartment, residential, well water, industrial, rv, and office uses. Certified by an independent laboratory to NSF standard. Comes with 4 gallon (3.2 gallon water capacity) storage tank and tank stand. Includes all filters needed for setup and first year of use. Can be wall / cabinet mounted or freestanding, made for indoor use. Can be installed undersink, in a basement or other remote locations, you may need additional tubing or a delivery pump depending on how far away you plan to install or if you plan to link to a refrigerator as well. For every one gallon of water produced the system discharges between one and three gallons (depending on the pressure and quality of your incoming water). The system is compatible with 3/8″ and 1/2″ under sink connections. includes filter housing wrench. Operates on 40-80 psi water pressure, you may need a booster pump or pressure regulator depending on your water pressure. The water is cleaner and more convenient than any pitcher, faucet filter, or countertop systems. Express Water’s 5 stage reverse osmosis water filtration system RO5DX is the complete solution for your drinking water.

Express Water – 3 Year Reverse Osmosis System Replacement Filter Set – 21 Filters, Carbon GAC, ACB, PAC Filters, Sediment SED Filters – 10 inch Size Water Filters
Sediment Filtration This RO filter replacement reduces: Sand, Dirt, Silt, Dust, Scale, Rust, and other sediments Pleated high capacity design captures more impurities than other replacement filters Made with precision packed 100% pure food-grade polypropylene microfiber Fast 1 GPM filtration Multi-Layered Smart RO Filter: Made with 4 distinct layers. The outer layers catch the coarsest particles, and the inner layers catch finer particles. This means your reverse osmosis replacement filter lasts longer, catching more sediments before it needs to be replaced
Carbon Filtration Captures more impurities than other Carbon filters with efficient laboratory vacuum heated carbon granules from cleaned coconut husks GAC filter and ACB: Precision thermal bonded cap with industrial sealed silicon ring prevents leaks High rejection rate of: Chlorine, Volatile Organic Chemicals, Halide, and Chemicals causing bad tastes and odors GAC filter and PAC: Equal Flow Technology: Efficiently arranged carbon granules create full coverage filtration which means your filter lasts longer giving you the best value in filtration ACB: Efficiently packed carbon granules maximize your filtration surface area which means your filter lasts longer and filters more

From the manufacturer

RO White

Pure, Healthy Water From Your Faucet

Start drinking healthy and stop drinking impurities with your own home Reverse Osmosis Water Purification. Express Water offers the highest impurity reduction rated RO Membrane for up to 99% reduction of major water impurities.

We have designed our system’s five stages of filtration to work together for long lasting high grade impurity filtration, giving you the cleanest water and the best value in filtration.

Choose the best in home filtration and start drinking healthy today!

RO White

  • Express Water’s 1st stage is a Sediment filter that targets dirt, dust, sand, and rust.
  • The 2nd and 3rd stages are Granular Activated Carbon and Activated Carbon Block Filters which focus on pollutants like chlorine, volatile organic chemicals, and odor causing compounds.
  • These early stages help extend the life of the 4th stage, the Reverse Osmosis Membrane. The membrane focuses on the most difficult impurities like lead, arsenic, chromium, fluoride, TDS, radium and others.
  • The 5th stage is a Post Activated Carbon Filter which does a final pass on your water, right before it comes through the faucet, removing any possible taste or odor.

It’s the combination of these stages that has given countless customers water purer than bottled water straight from their faucet.

NSF certified tested performance

Independently Tested

Express Water RO Systems have been independently tested by a third-party ANAB accredited testing laboratory that use established NSF / ANSI drinking water standards, including NSF/ANSI Standards 42, 58, 401 and EPA 524.2, for the reduction of TDS (total dissolved solids), chlorine taste & odors, emerging compound and incidental impurities, and more.

  • Heavy Metals: >99.96% (Including Mercury, Lead, Uranium, Chromium VI and more)
  • Chemical Disinfectants: 99.68% (Chlorine and Chloramine)
  • Fluoride: 99.83%
  • Pharmaceuticals: >99.99% (Including Ibuprofen, Caffeine and more)
  • Nitrates / Nitrites: 99.26%
  • Volatile Organic Compounds (VOCs): >99.99% (Sources include paint, varnishes, gasoline, smoke and more)
  • Semi-Volatiles: >99.29% (Including hydrocarbons, ethers, PCBs and more)

Further information can be found in our Specification Sheet (PDF) link below.

Proven Quality

  • Air Jet: Every system is checked for leaks by an air injection pressure test. Water Pressure: Each component undergoes intense high water pressure tests to ensure durability. Cycle Resistance: Systems undergo simulated heavy use to make sure they can handle anything.
  • NSF Certified: The foundation of our systems, the RO5DX and RO10DX meet or exceed NSF standard 58 for system construction. Certified for lead free construction, reduction of dissolved solids, and cycle test reliance. License#C0393496-01 Issue Date: October 22nd 2018.

Fetched from B01LR6OMU4.

Start drinking healthy and stop drinking impurities with your own home Reverse Osmosis Water Purification.

Five stages of filtration work together and compliment each other for long lasting high grade impurity filtration.

Choose the best in home filtration and start drinking healthy today!

Fetched from B01LR6OMU4.

Fetched from B01LR6OMU4.

Sediment Filtration

Carbon Filtration

Additional information


System + Filter Set

Item Package Quantity




Date First Available

August 12 2022


Express Water

10 reviews for Express Water RO5DX Reverse Osmosis Filtration NSF Certified 5 Stage RO System with Faucet and Tank – 50 GPD, 14 x 15 x 5,

  1. Zach W

    Great RO at an amazing price (Highly recommend purchasing a permeate pump as well)I’ve had RO systems for the better part of 20+ years. Our household goes through a lot of fresh water daily, so having an RO system has paid for itself many times over. Even if you don’t go through a ton of water for drinking, cooking, iced tea, etc…the convenience of not having to buy unlimited amounts of bottled water and/or filling water jugs at your local water store is definitely an added bonus. I’ve had 3, 4 & 5 stage RO units throughout the years and they’ve all produced great tasting water. My past 3 or 4 RO units (which are usually purchased when we move houses) have been Watts Premier models. They specialize is very fast & easy filter changes and they are definitely easy filter changes. However, you pay a little larger price for that convenience. Their 4-stage RO units run about $200 and the yearly filter changes run about $60. RO units also have 2 types of faucets: 1) faucets with an air-gap and 2) faucets without an air-gap. By definition: “Air gap faucets were designed to protect the RO system. In the event of clogging, a small amount of air, rather than dirty water, would go back into the RO system”. The air gap will always make some noise when the tank is filling as air and water pass through the drain line and sound escapes from the little air gap hole. The Watts Premier RO systems have an air gap. If your system has an air gap, you cannot replace the RO faucet with a non-air gap faucet…you need to replace the faucets (if necessary) with the same kind. During my most recent search for an RO unit to install in a new home purchase, I came across this Express Water RO unit at an amazing price (which included a year of filter changes). I was a bit skeptical given the price, but the amount of solid reviews made it an appealing option. I made the purchase and had friend help with the install since I am a large framed man that does not easily fit under the sink area. After a month of use, I can say I am very happy with the taste, performance & overall experience with the RO. With that said, I found myself missing the benefits of the permeate pump that I had installed in my last house. If you just care about the RO review, then I am very pleased and give it 5 stars. If you want to know what a permeate pump is and WHY you should get one, read on.This is the permeate pump available on Amazon that I purchased and am reviewing below: me start by saying I will NEVER have another RO system without a permeate pump again. Permeate pumps use the wastewater that is expelled during the RO process to greatly increase water pressure at the RO faucet, minimize wastewater and fill the tank in less time. They can be installed on nearly all standard RO systems aftermarket so there’s no need to buy a bundled RO system that includes the permeate pump (since most of those cost a lot more than buying the units separately).I was introduced to permeate pumps about 4 years ago. I purchased a Watts Premier RO system from Costco (when they still sold Watts Premier) and had it installed by a plumber (since I needed a hole drilled in my granite countertop). I consider myself pretty handy and although plumbing in general isn’t rocket science, I’m a large framed man that hates trying to squeeze under sinks to do pretty much anything plumbing related. After the RO was installed, I was getting smaller (and broken) pieces of ice at my refrigerator since my RO was feeding my ice maker through a longer 1/4” line from the kitchen island to the refrigerator. This a drawback of a lot of RO systems which feed ice makers that aren’t in very close proximity. After researching I came across a permeate pump (sold through Watts Premiere) and made the purchase. The included instructions were specific for the RO unit I had and it was an easy install since the RO was already up and running. Immediately, you will notice several things with the permeate pump. 1) Permeate pumps make some noise. They generally click or “thump” every few seconds. This happens because the wastewater from the RO builds up pressure inside the pump that is then used to push fresh (permeate) water into the storage tank. When the pressure builds and releases, you get clicking or thumping until your tank is full. 2) Your RO faucet pressure increases dramatically. As a result of the increased permeate water being forced into the storage tank, the tank pressure within the tank bladder increases and you end up with water pressure comparable to your regular faucet. The line pressure at the refrigerator & ice maker (assuming you have them all hooked together) is also the beneficiary of the increased pressure and you get full sized ice cubes again.So, why wouldn’t everybody want one of these? Well, I think most people have never heard of them. If you have, then the results speak for themselves. HOWEVER, these do make noise…especially if your RO faucet has an air gap (that little hole in the back of the faucet that inevitably leaks water out of it when the drain line gets blocked with something). With an air gap, permeate pumps get VERY NOISY. The pump action not only clicks (or thumps) under the sink, but the air gap sound created from the pump gets much louder as well. The air gap noise on my Watts Premier Pure Plus unit was so loud I actually debated on getting another permeate pump in our new house. I ended up buying a highly reviewed non-air gap RO system from Amazon and had it installed for a month in my new house. As usual, the water taste and purity was perfect and I am pleased that my ice cubes were normal sized (since the builder installed a larger RO line from my island to the fridge). I just realized how much I was missing the RO tank pressure (which equates to faster filling of water jugs & cooking pots). I went back to Amazon and found this permeate pump which said it was the newer model that makes less noise. The unit arrived in about a week (no 2-day prime shipping available for it). I watched a YouTube video for installing it on a basic 5-stage RO and had it all hooked up in about 20 mins. I’m once again in RO bliss. The water pressure in the faucet just makes me smile…no more waiting a minute to fill a normal glass with water (OK it’s not literally a minute but felt that way to me). The noise is considerably less from the pump itself. I ended up buying some u-shaped plastic clamps (Amazon search: TmallTech Big Simple Clip Clamp 2.5″ Bracket Reverse Osmosis RO Membrane Housing (Pack of 3)) that hold the permeate pump to one of the RO filters so the pump is not directly mounted to the cabinet wall (like it was at my previous house). Also, since I don’t have an air gap on this RO faucet, I have no additional noise from the faucet. If my house is silent, you still hear the pump cycling the water, but it’s minimal and it’s only until the tank is full. After that, it doesn’t cycle back on until water has been used from the tank. All in all, I missed the permeate pump benefits and will never have another RO system without one. I will also make sure I don’t get an RO with an air-gap faucet either.Hopefully this review helps people.

  2. Brian P

    Works great.I bought a whole house, cold vapor humidifier. It works great but found I had a problem with white dust from the minerals left behind even though our water is not very hard. I knew to eliminate the minerals it would take an RO filter so I looked around and found this system. Seemed reasonable priced.It was a pretty easy install as the instructions are really easy to follow. I bought a TDS meter, pressure gauge and de-ionizing filter cartridge to put on the output and bring the TDS level down to zero.It works great and brings my water down from 45-50ppm to zero ppm TDS. My water pressure is 60 psi and the RO membrane works fine at that pressure. But the humidifier can use about 4-5 gallons a day (it auto fills so don’t know the exact quantity) so to reduce the waste water produced I bought a booster pump. It raises the pressure to 90 psi and so it fills the tank quicker and reduces the waste water. That was pretty easy to retro fit to the system.It’s been about 10 months since I got it so I’ll be doing the first pre-filter/post filter changes soon. The RO membrane seems to be doing fine but my booster pump automatically flushes it before every use so that helps. If you don’t have a pump that can do that you should buy and install a manual by-pass valve. This allows you to flush the junk off the RO membrane once in a while and prolongs it’s life. But the replacements RO membranes are only $20.Besides the humidifier I also use it to fill my dogs automatic water bowl and my cats drinking fountain. All three benefit from the super clean water and lack of bacteria. The animals stuff never feels slimy when I clean it and I can let the humidifier go for a couple months and still have no signs of pink slime anywhere on in it when I do the cleaning. And of course the white dust problem from the humidifier has been eliminated.Definitely recommend it. But if you are using it for drinking water you might want an alkali filter on the output as some people find the taste of RO water to be flat. That filter will add a little minerals back in like they do with bottled water for taste. Which is pretty much this same process on an industrial scale. Express Water sells this same kit with that post alkali filter included.

  3. tacoman1287

    Express Water is the Best!I love Express Water products! This is probably at least the third or fourth RO system I have bought from Express Water because I keep moving. This purchase will actually be the second system for my current house, because I wanted filtered water in my master bathroom upstairs so I wouldn’t have to go all the way downstairs for water at night. In addition to tasting way better and being better for you due to the removal of harmful contaminants and heavy metals, the filtered water is also better for preventing mineral scale buildup in the clothes iron and humidifier upstairs as well as the formula maker, Keurig, and steam mop downstairs. The Express Water kits are very well packaged, come with everything you need to install it under a sink, and the instructions are very clear and well written. The quality of the components are top notch, and you can really tell that EW put some time into making the kits intuitive and easy to use. I consider myself pretty handy, but I have no doubt that someone with less mechanical inclination could easily install this with no help. The scariest part is drilling a hole in the countertop or sink surround in order to install the faucet, although most of my past applications have had one already available for use or repurpose, such as one occupied by a soap dispenser. You will also need to drill a small hole in the vertical drain pipe (tailpiece) of your sink to install the saddle adapter for the RO drain line. Even then, this part can be replaced for a few dollars with a quick trip to a home improvement store if you mess up. Take your time and follow the color-coded instructions and you can easily have this hooked up and running in less than an hour.PRO TIP: Unless you are replacing an existing under-sink water filter setup, you will likely need some sort of two way splitter for your cold water supply line in order to tap into the house water supply. This is not included with the EW kits because there are just too many different applications for EW to included the necessary components in their kits. I recommend taking a picture of your cold water supply line under the sink, including any valves or fittings. This will help you or an associate at the hardware store find what you need to tie into your water line without having to make multiple trips. (Ask me how I know). Overall I continue to be impressed by Express Water products and I am sure that I will be purchasing more sometime down the road.

  4. James C. Reneau

    Rare 5 Stars from HomebrewerFirst off, I rarely give an all 5 stars.At my old house, I had a nice Reverse Osmosis (RO) system and it did well. So, when I moved to this new house I wanted another RO system. The one I had before was not an option since getting the filters was an issue. So I did some research on this system and the availability of the filters and decised on this one.OK, the good: The system arrived promptly and was packaged well. Once unpacked you will notice that it is of pretty good quality. It had an additional set of replacement filters and had the new style push in connectors (DON’T forget the use the included blue clips) for the ease of installation. The system came with very easy to use instructions and enough tubing for a system twice the size. The system came with a leak sensor that automatically shuts the system down if a leak is detected, AWESOME.The chrome hardware seems to be fairly standard in quality and looks stylish. the system took me about 45 minutes to install and I don’t recall needing tools to install outside a screwdriver.Once installed, I needed about 24 hours or filling and draining, filling and draining in order to clear out the system of manufactuing and charcoal sediments. After the clearing of the system, I used a Total Disolved Solids (TDS) meter to check the water. The TDS was at 6 and fell to between 0-2 since then.Lastly, I have noticed that the system is extremely fast at replenishing the use water and while there is some sounds of the waste water going down the drain, it seems to be minuscule. I have not noticed any increases in my water bill. I would RECOMMEND this product.Now for the bad: …..umm , noneHope this helps.

  5. Jeff Burmann

    My Go To RO SystemI just finished installing my second system at my new home. My first is still in use at my brothers house. I recently moved and bought another one for the new place and am so excited to have super clean and clear water again. It takes some time to install but I think it’s pretty straight forward. I bought a Tee splitter for the lines to also go to my fridge. The tee is not included but you can pick one up for a few dollars at your local hardware store. I also have a TDS meter (total dissolved solids – $20 on Amazon), and it measures a 3 – practically pure H2O.Be sure all your filters including the ones that are already on the system are tight to prevent leaks!

  6. That other guy

    Self installation is possibleI installed this system with a permeate pump and a drain line adapter. I’ve got a single sink with a garbage disposal and worried that I’d need a plumber to install it correctly. The drain line adapter means no drilling was required for the discharge line but I did need a 3/8″ to 1/4″ reducing connector from Lowe’s.Installation took about 4 hours which includes a 45 minute run to Lowe’s and a lot of reading of the manual.TDS in the system’s water is 11. From the tap is 215. From the refrigerator filter is 186. 72 From deer park.The water tastes great too

  7. J. Schumacher

    This has to be the best supplier I’ve ever seen!Forget about the water for a moment. This is easily the most professional and well thought out product I’ve ever purchased. It was like buying a top Mercedes. Fantastic instructions, spare parts and extra filters, along with great packaging. The engineering and pre build took the guesswork out of the installation, making everything simple and direct. I recognize that people don’t always install these systems correctly, or sometimes there are leaks initially, so they added a shutoff valve to close the water in the event of a leak. So smart, I’m very impressed. I do recommend that you razor cut every hose end and not use them straight out of the box, as I learned in the past that they are sometimes uneven or out of round from the factory. The water? Honestly anything is better than the terrible water we have locally in Tennessee, but this tastes great and the swamp chlorine smell is gone.

  8. Sah-Weet

    Best RO unit for the priceThe items are secured very well for shipping and are easy to unpack. This Vendor has included everything I needed for install as well as some spare parts, just in case they are needed down the road. Additionally, it comes with a spare set of filters as well.The installation was uneventful and easy to perform by following the written instructions and pictograms.I have no recommendations for this Vendor, it seems they have thought of everything. You cannot beat this price point, the quality and the included accessories with any other unit on the market.Tank size appears to be about 11 quarts based on the flushing of this unit.If I ever need another RO unit, I know which one to buy.I recommend to purchase immediately before the Vendor wakes up and raises prices.

  9. Alex J.

    Recommended as an engineer with industrial water prurification experience.A well made system that is competitively priced. I am an engineer with experience in industrial pharmaceutical water purification and I have installed multiple of these units for family and friends. The kit comes with everything needed for a standard installation and the color coded tubing and the stop leak assemblies make this an even better value.Installation instructions are clear, color coded, and easy.Once the necessary stabilization period has elapsed the TDS is well under control as measured by an industrial meter.The 3 year replacement filter sets from Express water are amazingly priced and recommended.I have knocked one star off for the following reasons.1) I wish the sediment filter housing was clear. (this is a nice to have not a dealbreaker)2) The Fittings on the RO housing are sealed using PTFE tape, I wish these O-ring sealed. One of the units I installed did have a small leak on the permeate outlet fitting that was factory installed. I just took the fitting off, applied a thicker layer of fresh tape and all was fine.Overall I’d highly recommend this system.

  10. David F Braden

    Does job good valueI bought two of these units for water to supply my house an apartment and also fish tanks. I have had in service for 5 months and finally changed filters the water seems pretty good quality. I also added a UV light. Have monitor on unit and reading always around 4 microns I had a family member that had a osmosis unit but there unit was substantially more expensive along with the filters and the filters seemed more difficult to change and there water quality not any better

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