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Express Water Reverse Osmosis Alkaline Water Filtration System – 10 Stage RO Water Filter with Faucet and Tank – Under Sink Water Filter with Alkaline Filter for Added Essential Minerals – 50 GPD

  • Based on 7,939 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Mar 3
Order within 5 hours and 20 minutes
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Style: 50 GPD pH+ RO


Features

  • Reverse Osmosis Water Filter: Experience what water should taste like with the Express Water reverse osmosis water filtration system filtering up to 99. 99% of Lead, Chlorine, Fluoride, PFAs/PFOs, Calcium, Arsenic, and more
  • Alkaline Water Filter: Express Waters Alkaline Water Filter with Active Mineral Technology adds Calcium, Potassium, Magnesium, and other minerals to your water
  • Under Sink Water Filter: Dont waste money on professional installation. Express Waters quick and easy-to-understand design means you can install and understand everything about your new water filtration system
  • Quality : Rest easy with our 1-year on all Express Water Reverse Osmosis Water Systems. System dimensions: 17x15x5 inches, Tank dimensions: 15x12x12 inches
  • Under Sink Water Filter System: No need to mess with refilling or activating your water filter, Express Waters water filtration systems automatically fill your water tank with high quality drinking water

Description

Make the purest alkaline mineral water with your own home alkaline water system. Great in the kitchen: Improve the taste of your cooking, coffee, ice, and drinks. Experience true Reverse Osmosis purification. Safe filtered fresh tasting H2O: Removes up to 99.99% of contaminants including Lead, Chlorine, Fluoride, Cyanide, Giardia, Radium, Asbestos, Calcite, Heavy Metal, Bacteria, Viruses, Pharmaceuticals, and over 100 other contaminants. Get setup fast with our Quick Connect tubing system. Long lasting filters of the highest capacity standards mean you only need to change your filters every six months. Includes fast flow faucet with 0.8 GPM delivery. A compact system made to fit under a sink in a cabinet. Best for house, apartment, residential, well water, industrial, rv, machine, and office uses. Certified by an independent laboratory to NSF standard 58.Comes with 4 gallon (3.2 gallon water capacity) storage tank and tank stand. Your tank can sit upright or on it’s side to make sure it fits under most kitchen cabinets. Includes all filters needed for setup and first 6 months 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 counter top systems. Express Water’s 10 Stage Reverse Osmosis Water Alkaline Filtration System ROALK5D is the complete solution for your drinking water.

Brand: EXPRESS WATER


Special Feature: NSF certified


Product Dimensions: 15"L x 5"W x 17"H


Package Information: Tank


Installation Type: Under Sink


Power Source: Water Pressure


Item Weight: 29.5 Pounds


Model Name: ROALK5D


Maximum Flow Rate: 0.8 Gallons Per Minute


Upper Temperature Rating: 1E+2 Degrees Fahrenheit


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 15 x 5 x 17 inches; 29.5 Pounds


Item model number ‏ : ‎ ROALK**


Date First Available ‏ : ‎ August 18, 2014


Manufacturer ‏ : ‎ Express Water


Country of Origin ‏ : ‎ Taiwan


Best Sellers Rank: #2,884 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #6 in Under-Sink & Countertop Filtration


#6 in Under-Sink & Countertop Filtration:


Customer Reviews: 4.6 4.6 out of 5 stars 7,939 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Mar 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great RO at an amazing price (Highly recommend purchasing a permeate pump as well)
Style: 50 GPD RO
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: https://www.amazon.com/gp/product/B005VPPRX4/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1 Let 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. ... show more
Reviewed in the United States on June 5, 2020 by Harley

  • Impressed thus far!!!!
Style: 600 GPD Tankless pH+ RO
I purchased this unit due to the free space I have under my sink. I am not a fix it person by trade, not a plumber, electrician. Etc. From start to finish it took 1 hr to install. That's the time to open the box and package, gather the tools, read instructions and install parts. The instructions were easy enough to follow and understand for me. I took my time to install so I'm sure the time can be cut down to a much lesser time. After following the 1st time use instructions the unit seemed ready to go. I've seem some reviews.....I do not have any leaks, or poor fittings with my experience. I also do not have a chemistry set to test the water but according to the indicators on the system and my families opinion there is a difference in quality. My assumption is it will continue to improve with further use. All in all I'm extremely pleased at the moment and I would very much purchase this again at this time. If you're considering purchasing it, get it for sure. I can only attest to the single unit with 2 cartridges. Like I stated if I had the space I'd chosen the other. But I'm pleased with no complaints with this unit. ... show more
Reviewed in the United States on January 1, 2025 by Daeweau Muhommad Daeweau Muhommad

  • Well made, good results after flushing
Style: 50 GPD RO
The system as bought works quite well. It was easy to assemble, it didn't leak (well, after I tightened the top of the tank a bit more), and started working immediately. It makes water a bit faster than their estimates. My input water is fairly low in TDS (about 80) and yields final water after flushing of about 8-10. The only real downside is that the final carbon filter is pretty dusty, and took a lot of flushing to get rid of the grey. I ended up hooking the input water directly to it for 5 minutes or so (i.e. high pressure) and that cleared up nicely. In my case I wanted a lower final TDS to use in humidifiers so as not to leave any residue, so I also ordered a separate deionization filter to use in place of the final carbon filter (my humidifier does not care about taste!), and that's now giving me 0-1 TDS as the final output. I was a bit disappointed they do not include the ability to flush the RO membrane, at least I did not see that even addressed, but an assortment of connectors fixed that (it just requires bypassing the flow restrictor while flushing). I guess they don't consider it necessary. All in all I'm quite pleased, the main filters are standard sizes (i.e. I don't have to buy from them), the plumbing was all provided, even Teflon tape (and lots of it) and nice clear instructions. Well done product. ... show more
Reviewed in the United States on December 21, 2024 by Linwood

  • Great tasting water!
Style: 50 GPD RO
This RO system was easy to install, I had no problem with leaks and it functions perfectly. It is well designed and pretty easy to install. The water tastes great, our city water tastes like minerals. Yes, it can be slow filling up a gallon container, but that’s a small price to pay for excellent water. It came with extra replacement filters which is nice. ... show more
Reviewed in the United States on February 15, 2025 by Mark D.

  • Easy install but directions are out of date
Style: 50 GPD RO
Just needs some updates to the instructions based on how it's delivered, other than that very easy to install and no leaks.
Reviewed in the United States on January 31, 2025 by Phil W.

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