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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 17 x 5, White

4.6 4.6 out of 5 stars 7,421 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Under-Sink & Countertop Filtration by EXPRESS WATER

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RO System

Purchase options and add-ons

Material
Alloy Steel, Brass, Plastic
Capacity
4 Gallons
Included Components
RO5DX, Extra Filter Set, Owners Manual
Purification Method
Reverse Osmosis

About this item

  • 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.
  • 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
  • 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
  • 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
  • Leak Detection: Each under sink water filter includes an emergency leak stop detector that shuts off water flow when it detects unwelcomed moisture
  • Customizable RO Water Filter System: Express Water home water filtration systems are fully upgradable and customizable with quick connecting fittings. Try additional filtration attachments including UV Water Filter, Alkaline Water Filter, Deionization Water Filter, and more
  • On Demand Support: Support from experts who can answer any of your questions about your new water filter

Additional Details

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 14 x 5 x 15 inches; 31 Pounds
  • Item model number ‏ : ‎ RO5DX
  • Date First Available ‏ : ‎ March 17, 2014
  • Manufacturer ‏ : ‎ Express Water
  • ASIN ‏ : ‎ B00J2DGTD8
  • Country of Origin ‏ : ‎ Taiwan
  • Customer Reviews:
    4.6 4.6 out of 5 stars 7,421 ratings

Product Description

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.


From the brand


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.

Deluxe Chrome

RO10MX

White housing

RO10MX

Water When You Need It

With efficient filtration and quick delivery, get your water fast.

Deluxe Chrome faucet with brass water way for pure water delivery.

Fast Flow Rate: Get your water fast. Water through your faucet at 0.8 GPM!

An adult should drink 0.5-1.55 gallons of water a day. Makes more than enough water for the whole family!

Always Ready: This system can produce up to 50 gallons of pure water a day.

Save Your Time

Express Water offers several features unique to this system.

Our Quick Connect system is fast, easy, and helps prevent leaks.

Our Leak Stop Valve shuts off water flow if excess water is detected. A fabric disk stays on the floor beside your system. If for any reason water is absorbed the flow to your system is stopped.

Included Brass Feed Adapter and Quick Connect Adapter means no going to the hardware store to buy parts. The feed adapter fits the two most common sizes of under sink pipes 1/2” and 3/8”.

Easy Swap

Filter changes are quick and easy with simple design and clear labels.

A labeled color matched system so you know what goes where at a glance.

Your pre & post filters are swapped out only twice a year: Sediment, Granular Activated Carbon, Activated Carbon Block and Post Activated Carbon.

The Reverse Osmosis Membrane is replaced only once a year.

Double Sealed Filters to preserve your filters and your kitchen. Each filter is double sealed to provide the best filtration efficiency and value.

Here To Help

Our water technicians are here to answer any questions you may have about your system or your home’s water in general.

If you run into a question or problem, we want to help you through it. We’re not happy unless you are.

Have any questions about your system or your home’s water answered by experts

Questions before buying? Just give us a call!

RO5DX ROALK5D ROUV10DCG ROALKUV10M RODI10D ROELITE9
RO System ALK System UV System ALK + UV System ION System Elite RO
Customer Reviews
4.6 out of 5 stars
7,421
4.6 out of 5 stars
7,421
4.6 out of 5 stars
312
4.6 out of 5 stars
1,852
4.5 out of 5 stars
375
4.4 out of 5 stars
27
System Name RO5DX ROALK5D ROUV10DCG ROALKUV10M RODI10D ROELITE9
Filtration SED, GAC, ACB, ROM, PAC SED, GAC, ACB, ROM, ALK, PAC SED, GAC, ACB, ROM, UV, PAC SED, GAC, ACB, ROM, ALK + UV, PAC SED, GAC, ACB, ROM, ION, PAC SED, GAC, ROM, ALK, PAC
Gallons Per Day 50 GPD 50 GPD 100 GPD 100 GPD 100 GPD 100 GPD
Reverse Osmosis Filtration
Sediment (Dirt, Rust, Sand) Reduction
Chlorine and VOC Reduction
Alkaline Mineralization
Ultraviolet Filtration
Deionization Filtration
Pressure Gauge

What's in the box

  • RO5DX, Extra Filter Set, Owners Manual
  • Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    7,421 global ratings

    Customers say

    Customers like the quality, ease of installation, and value of the water purification unit. For example, they say it works great for the price, provides great water, and is easy to install. Customers are also happy with the filter, taste, and missing parts. That said, opinions are mixed on leakage.

    AI-generated from the text of customer reviews

    924 customers mention832 positive92 negative

    Customers find the installation of the water purification unit to be easy. They mention that the plumbing was very easy, and the leaks were manageable and straightforward. The instructions are great and color-illustrated, making the installation process simple and straightforward, and it saves a great deal of time.

    "...instructions were specific for the RO unit I had and it was an easy install since the RO was already up and running...." Read more

    "...The plumbing was very easy and straight forward. I did add a permeate pump, which I also purchased from Amazon...." Read more

    "...With its exceptional performance, easy installation, and customizable options, it's a must-have addition to any home...." Read more

    "...whatsoever and it looks nice and clean and was so cheep and simple to install......" Read more

    630 customers mention594 positive36 negative

    Customers are satisfied with the quality of the water purification unit. They mention that it works great for them, has good equipment, and is easy to install. Customers also appreciate the taste, performance, and overall experience with the RO.

    "...I can say I am very happy with the taste, performance & overall experience with the RO...." Read more

    "...I was pleasantly surprised when I opened the box. The unit is a quality built unit, with a manifold that houses the 3 standard filters on the..." Read more

    "...Express Water's filtration system is specially engineered to work harmoniously, ensuring that every drop you drink is the best-tasting and safest..." Read more

    "...We could not be more happy to have this very inexpensive and quality system in our home and the extra security of having pure water is awesome!!!..." Read more

    549 customers mention495 positive54 negative

    Customers are satisfied with the taste of the water purification unit. They mention that it adjusts water temperature, and the water taste good. Some complain about the waste water.

    "...After a month of use, I can say I am very happy with the taste, performance & overall experience with the RO...." Read more

    "...The water from this unit tastes great, with absolutely no odor, and is of very high quality...." Read more

    "...The result? Water that tastes pure, clean, and refreshingly crisp. It's like having a natural spring in your own home...." Read more

    "...Water tastes similar to distilled water as compared to our regular water... We could not be more..." Read more

    445 customers mention357 positive88 negative

    Customers like the water quality of the water purification unit. They say it provides all the clean water they need, and it works well to reduce wastewater. Customers also appreciate the clear water, which is easy to drink right out of the faucet. Overall, customers are happy with the quality and cost-effectiveness of the product.

    "...RO process to greatly increase water pressure at the RO faucet, minimize wastewater and fill the tank in less time...." Read more

    "...this one out after a couple of years, but for right now, it supplies all the clean water I need...." Read more

    "...Plus, the system automatically fills your water tank with high-quality drinking water, so you don't have to worry about constant refilling or..." Read more

    "...it is no problem whatsoever and it looks nice and clean and was so cheep and simple to install......" Read more

    339 customers mention322 positive17 negative

    Customers are satisfied with the value of the water purification unit. They mention that it is easy to install and a good price. Customers also appreciate the cheap filters and the fact that they can change them monthly. Overall, customers are happy with the product and find it to be a great value.

    "...new home purchase, I came across this Express Water RO unit at an amazing price (which included a year of filter changes)...." Read more

    "...to our regular water... We could not be more happy to have this very inexpensive and quality system in our home and the extra security of having..." Read more

    "...All in all, you're going to get great water at a good price. My advice is to be thoughtful about where you put it...." Read more

    "...may be doing are enough to raise some concerns and this is decently priced so we decided to give it a go...." Read more

    217 customers mention153 positive64 negative

    Customers like the filter. They mention that it comes with extra filters, an additional set of replacement filters, and excellent filtration capabilities. They also appreciate the 5 stage filtering and the ability to easily add additional filtration attachments, such as a UV Water Filter or Alkaline Water Filtration. Customers also mention that the filter changes are easy and that they're stocked for 4 years now.

    "...They specialize is very fast & easy filter changes and they are definitely easy filter changes...." Read more

    "...You can easily add additional filtration attachments like a UV Water Filter, Alkaline Water Filter, Deionization Water Filter, and more to tailor..." Read more

    "...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...." Read more

    "...The product came fast it came with an extra set of filters for the three main stages of filtration...." Read more

    78 customers mention56 positive22 negative

    Customers like the missing parts of the water purification unit. They mention that it comes with all the necessary parts, including spare parts. Some say that the kit has everything needed for typical connections and under sink installation. Customers also appreciate the instructions and extra filters.

    "...The unit was complete with fittings to connect it under the sink, and includes the sink faucet with a nice mounting washer that fit in an existing..." Read more

    "...It came with fittings to install completely with a simple set up...." Read more

    "...of the several supplied boxes, I was concerned that these parts were missing...." Read more

    "...I didn't buy the uv filter but if I had a well I would have. The kit was great, had everything I needed except a drill bit for my sink." Read more

    209 customers mention78 positive131 negative

    Customers have mixed opinions about the leakage of the water purification unit. Some mention that they've had no leaks, while others say that there was a couple small leaks in the beginning but they got them corrected.

    "...It was leaking from the drain connection into the unit. So I turned off the water, removed the included “U-clip” and then my black drain hose...." Read more

    "...The inclusion of an emergency leak stop detector is a thoughtful touch...." Read more

    "...The only problem is water tank connector has small leaking randomly. I need to manually pull the small valve to stop leaking issue...." Read more

    "...The leaks were manageable and fixing them was straightforward, but that's still enough trouble to mean I've had to replace the bottom of the cabinet..." Read more

    No more 5 Gallon jugs
    5 Stars
    No more 5 Gallon jugs
    What a tremendous time saving and inexpensive way to get good water. Y’all I’m on a well and yes it still works with only a permeate pump. If you want it even flow faster add some gauges and a pump to increase pressure (future project).Water has 8PPM now, before I had 497PPM. See in my setup I even added in the hot water/cold water dispenser from AVALON yesterday and left its filters and provided typing etc. off. It uses same 1/4 diameter water line and seems to work really well together. Just use a Y splitter after your last stage if you’re intending on installing the provided faucet too.This is the best setup I could think of. Under $300 and you’re in business. I used to pay $120 for 12 x 5 gallon jug delivery.
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    Top reviews from the United States

    Reviewed in the United States on June 5, 2020
    Style: RO SystemVerified Purchase
    310 people found this helpful
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    Reviewed in the United States on March 20, 2015
    Style: RO SystemVerified Purchase
    21 people found this helpful
    Report

    Top reviews from other countries

    Translate all reviews to English
    Lynn K.
    5.0 out of 5 stars Good product
    Reviewed in Canada on March 15, 2024
    Style: RO SystemVerified Purchase
    RONAL
    5.0 out of 5 stars La instalación no es compleja pero no es rápida
    Reviewed in Mexico on January 4, 2023
    Style: 50GPD, Deluxe Chrome FaucetVerified Purchase
    One person found this helpful
    Report
    Cèsar Mendoza Meneses
    5.0 out of 5 stars Excelente purificador de agua solo hay que agregarle la bomba de presión.
    Reviewed in Mexico on May 27, 2022
    Style: RO SystemVerified Purchase
    7 people found this helpful
    Report
    Jon C
    5.0 out of 5 stars Amazing System
    Reviewed in Canada on July 14, 2020
    Style: 50GPD, Deluxe Chrome FaucetVerified Purchase
    Customer image
    Jon C
    5.0 out of 5 stars Amazing System
    Reviewed in Canada on July 14, 2020
    For the money this is hands down one of the best systems. It was easy to install. The flavour of the alkaline water is great.
    We hooked it up to the fridge so it took a bit more to install it because of all the filling and emptying you need to do to get it set up. Before connecting it, I hooked up the faucet temporarily and drained it into the sink.
    The first day or two, there was a strange rubber-like flavour in the water. This is normal. The rubber bladder inside the tank needs a few cycles of expansion and contraction to loosen up. If you get that flavour or rubber, all you need to do is to completely drain the tank 2 times and then it’s gone. But make sure you drain it to the point where the water comes out as a trickle and you’ll know it’s completely empty.
    I have had it for 5 months and I think it’s ready for the first filter change. We have not had a single problem with the system. It does make a funny sound every once in a while but that’s just the bladder making noise.
    It’s a great product at a great price. Very well packaged and easy to understand instructions. It took me only 45 minutes to set it up.
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    5 people found this helpful
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    Trevor Wheaton
    5.0 out of 5 stars Installation review
    Reviewed in Canada on December 17, 2023
    Style: 50GPD, Deluxe Chrome FaucetVerified Purchase
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    Trevor Wheaton
    5.0 out of 5 stars Installation review
    Reviewed in Canada on December 17, 2023
    Installation instructions are super easy and clear. I however didn’t properly install the Teflon tape on first install which caused several leaks. So definitely use Teflon tape and make sure to use channel locks when tightening. Will expand on review in 2-3 months.
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