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EXPRESS WATER

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 8,299 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Jun 23
Order within 3 hours and 23 minutes
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Style: Osmosis + Minerals


Size: 50 Gallons/Day


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: #1,703 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #4 in Under-Sink & Countertop Filtration


#4 in Under-Sink & Countertop Filtration:


Customer Reviews: 4.6 4.6 out of 5 stars 8,299 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jun 23

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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Similar Products

Top Amazon Reviews

    • Great RO at an amazing price (Highly recommend purchasing a permeate pump as well)
Style: Purely Osmosis Size: 50 Gallons/Day
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
    • Don’t get get intimidated, do have tools on hand
Style: Purely Osmosis Size: 50 Gallons/Day
For anyone thinking of buying this, installation requires drilling- for some sinks a hole for the faucet is required, but mine actually had a spot for it ready to go. A hole for the drain saddle valve will also be required, and that probably won’t be there unless you’re renting and someone else installed one (hilariously this was the case in my place). The rest is doable with basic stuff like a Philips screwdriver. Installing the unit is a lot of work but none of it was hard. I am decently handy, but my plumbing experience is near zilch and I still did fine. I appreciated the color coding, labeling and directions. I was able to assemble the whole thing from following the manual without having to do any internet searches to supplement what was provided. The only warning I’d give someone putting this together is, make absolutely sure you push the lines in as hard as you can to prevent leaks. I didn’t push the one that goes to the cold water line in far enough and got sprayed in the face the second I opened the valve. As far as the end result, so far so good. I just had my first glass of water from it and it tastes excellent. Pressure is good too, I didn’t need a pump to get it working but I did see other reviewers mentioning it. If this review hasn’t been updated in a few months that means I haven’t found anything to complain about. ... show more
Reviewed in the United States on March 26, 2025 by Jess
    • Best filter ever
Style: Osmosis + Minerals Size: 50 Gallons/Day
Review Image by Jose fernandez Jose fernandez
Bought it because my brother and my mom has one each and it really does what it saids, water taste so good like coconut like one of the filter saids, not hard to settle, inly down is you need to flushed for 9 to 15 hour before use when you first set up the filter and when you have to change for new filters as well unless you have the booster pump you can probably do it in 8 hours if im not wrong because it help to fill up the tank quick, it works super well, it has a really really good water pressure, not as my mom that need it a booster pump. Well like i said the water taste so good like if you drinking coconut water 😊 ... show more
Reviewed in the United States on April 28, 2025 by Jose fernandez Jose fernandez
    • Love it
Style: Purely Osmosis Size: 50 Gallons/Day
Water went from at least .68ppm to .02ppm on a TDS meter. And even without measuring, the taste speaks for itself. Great water that tastes like nothing. I don't know how we lived without filtration for so long. Our municipal water quality is very good but hey, it's still full of BS like chlorine, fluoride, and whatever other nonsense contaminants end up in the water supply on the way to our faucet. None of it belongs in a human body. This resolves that issue. Excellent packaging and installation instructions. If you have at least one competent individual in you house that can use basic tools and can assemble stuff with instructions, you can do it yourself. I went slow and took my time. installation took a few hours because I didn't rush. Space was tight and some under sink rearranging had to be done, as well as a new hole in the stainless sink. But just don't rush and double check each step and you'll be fine. Or I guess call a plumber, but really it's not that hard. ... show more
Reviewed in the United States on April 10, 2025 by MK
    • See why I took a star away....
Style: Purely Osmosis Size: 50 Gallons/Day
This is a very nice RO system. Now that it is all installed I like how it works and it truly does a good job of filtering the water. I took a star away because the directions were difficult, let me explain: It is a very nice booklet that they had printed however it isn’t a step 1 do this step 2 do that type of booklet. You have to read through a lot to figure out what is next to do. In addition, because it’s such a nice booklet (graphics and printing - not instructional) they probably didn’t want to reprint it to update it. It has information in there that refers to a different type of system and it makes it VERY confusing to follow. For instance, it said to attach a certain end on one of the plastic tubes only to discover that it wasn’t the system I had. I had to call and get some clarity on what was next. As far as the system goes I would give it a 5 star. Very nice. If you can get through the directions you will have yourself a very nice, quality RO system. ... show more
Reviewed in the United States on March 14, 2025 by tlc

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