U1 Supreme 3 - Year Bundle - RKIN

U1-W Supreme 3-Year Bundle

$980.95 $1,282.32 · Save $301.37
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Pre-order beats waiting. Same product, same warranty. Lock in the pre-order price while we finish the next production run. Estimated to ship early December. The discount ends as soon as the pre-order batch sells out.

1-Year Satisfaction Guarantee

Insured Fast Shipping

Best Price Guarantee

Expert Staff Support

The Last Water Appliance You’ll Ever Need

Imagine decluttering your kitchen counter, replacing your kettle and water pitchers with one elegant device that delivers instant hot, cold, and room-temperature purified water. The U1 Supreme 3-Year Filter Bundle is our premium package, designed for long-term convenience and performance from the moment you unbox it.

Your All-in-One Hydration Station:

  • Instant Hot, Cold, & Ambient: Enjoy reverse osmosis-purified, hydrogen-infused, alkaline water on demand, at the perfect temperature for coffee, tea, or a refreshing cold drink.
  • 3 Full Years of Filters: The U1 arrives with the first year of filters pre-installed, and this bundle includes a complete 2-year replacement pack for the next two years.
  • Convenient Turntable Included: The included 360° turntable allows for effortless refilling and access, even in tight spaces.
  • UV Self-Cleaning & Space-Saving: A stunning, compact design that actively self-cleans with UV-C light to ensure freshness, from the filter to your cup.

Experience Ultimate Convenience and Purity

The U1 redefines what a water filter can be. Its five-stage filtration system pairs reverse osmosis with an alkaline post-filter that returns calcium and magnesium for a crisp, clean taste. 3rd party tested for the reduction of TDS, Fluoride, Lead, PFOA/PFOS, Hexavalent Chromium, and Trivalent Chromium. The intelligent touch panel and instant temperature controls put you in complete control, whether you're making baby formula, a pot of tea, or simply preparing a perfect glass of cold water.

What’s Inside the U1 Supreme 3-Year Filter Bundle:

  • 1 x U1 4-in-1 Water Filter System
  • 1 x First Year Filter Set (Pre-Installed inside the U1)
  • 1 x Complete 2-Year Replacement Filter Cartridge Pack
  • 1 x 360° U1 Turntable for easy access

Perfect For...

The U1 Supreme Bundle is the perfect upgrade for:

  • Busy Families: Get instant hot water for meals and drinks without the wait.
  • Modern Homes & Offices: Declutter your space with a single, elegant hydration solution.
  • Everyday Hydration: Enjoy purified, alkaline water (7–8 pH) with hydrogen infusion you can turn on or off.
  • Anyone seeking total convenience and a long-term filter supply.

Trust in Every Drop

We stand by the U1-W with a 1-Year Satisfaction Guarantee, which includes a warranty for the same period. Return steps and conditions are in our refund policy.

Ready for instant hot, cold and purified water? Pre-order the U1-W Supreme 3-Year Bundle today.

U1 1 Year Extended Warranty - RKIN

U1-W 1 Year Extended Warranty

$59.99
U1 Filter and hydrogen membrane removal tool - RKIN

U1-W Filter and hydrogen module removal tool

$9.95
Dual Function TDS Meter for Water Quality and Temp Measurements - RKIN

Dual Function TDS Meter for Water Quality and Temp Measurements

$14.99
U1 advanced Filter System

Advanced filter system

We want you to have the best quality water in your home…

That’s why U1 has an advanced filtration system with five stages. It removes up to 99% of all contaminants, including Fluoride, Chlorine, heavy metals like lead, and more.

An overview of U1’s advanced filter system

  1. Stage 1

    Sediment filter

    Filters out sand, sediment and rust.

  2. Stage 2

    Activated carbon filter

    Removes harmful chemical residues and carcinogens such as VOCs, THMs, and pesticides, which eliminates foul odors and bad tastes.

  3. Stage 3

    Reverse osmosis membrane filter

    Purifies water by blocking virtually all the harmful contaminants.

  4. Stage 4

    Alkaline post-filter

    Returns beneficial minerals, calcium and magnesium to purified water for the best taste.

  5. Stage 5

    Hydrogen infusion

    Creates antioxidant hydrogen-enriched water and can be turned off if not desired.

Elevate your lifestyle with U1 Space-Saving 4-in-1 Water Filter System - by RKIN

Plus, U1 has an intelligent touch control panel, so you can easily see the status of your filter. It also has a UV Light that keeps water fresh when the system is not in use.

Want an advanced water filter system?

But don’t want to deal with messy hoses, leaky diverter valves, or clunky installation? Meet the latest model of the U1 by RKIN with app-enabled features. Control and monitor your water system from your phone. This sleek, zero-installation water filter uses reverse osmosis, UV, and hydrogen technologies to transform ordinary tap water into pure, healthy, and delicious drinking water. It features an advanced five-stage filtration system to provide the purest, most refreshing water imaginable, unlike other systems on the market. Plus, you can choose your water’s temperature (hot or cold!), thanks to the temperature control system!

  • Tomatoes and cucumber slices in a splash of water

    Filtered alkaline and antioxidant negative ORP water

  • Reverse Osmosis, UV, and Hydrogen

    • Reverse Osmosis
    • UV
    • Hydrogen

    Water Treatment Technologies

  • Water quality and hydrogen content display

  • Custom cup size dispensing

  • Adjustable instant hot water

  • Cold water

  • Remote control via RKIN app

  • Hand turning a U1 filter cartridge a quarter turn to remove it

    ¼ Turn to remove easier filter changes

  • Filters ½ gallon of water in under
    7
    minutes
  • Elegant and compact
    4-in-1
    design

So, how does U1 Work?

How the U1 Space-Saving 4-in-1 Water Filter System works Water from the supply tank passes the sediment filter, the activated carbon filter, the reverse osmosis membrane, the alkaline post-filter and hydrogen infusion before it is dispensed. Filters 12345

SedimentChemical residuesPurified waterMineralsHydrogen

  1. Filters out sand, sediment and rust.

  2. Removes harmful chemical residues and carcinogens such as VOCs, THMs, and pesticides, which eliminates foul odors and bad tastes.

  3. Purifies water by blocking virtually all the harmful contaminants.

  4. Returns beneficial minerals, calcium and magnesium to purified water for the best taste.

  5. Creates antioxidant hydrogen-enriched water and can be turned off if not desired.

1. Fill the water tank.

2. Place the tank on the system and let it do all the work.

3. Once your water is ready, select your temperature (hot or cold), and enjoy.

U1 doesn’t require installation, so you can easily place it on your countertop - perfect for people who live in apartments, condos, and RVs.

Customizable temperature

Do you ever wish your water filter system had hot or cold water?

U1 has a customizable default water temperature setting so that your water is always set to the temperature of your liking. Plus, there’s an instant hot water option that’s perfect for baby formula, tea, instant coffee, and more!

The display will also show the Hydrogen content and water quality readings, so you’ll always know your system is working properly.

Alkaline and antioxidant hydrogen-enriched water

U1 includes a polishing Alkaline post-filter that returns beneficial minerals, calcium, and magnesium to purified water for the best taste.

It also increases the alkalinity of the water to a perfectly balanced level of 7-8 pH, similar to spring water.

Plus, U1's hydrogen-infused water delivers a negative ORP of 340.

Smart control panel and RKIN app

You can monitor your filtered water quality and filter status with U1’s intelligent touch control panel or the RKIN app, regardless of whether you are nearby or miles away. The RKIN app is compatible with the NEW U1-W model only.

With U1

You get an unconditional

1-year satisfaction guarantee

U1 vs Zero Installation Purifier

Features
Zero Installation PurifierCurrent Model Learn more about Zero Installation Purifier
U1-WNew Model Learn more about U1-W
Multi-Stage Reverse Osmosis Purity
Yes
Yes
AlcaPure for Alkaline Water 7-8 pH
Yes
Yes
OnliPure for 0 TDS
Yes
No
1 Year Satisfaction Guarantee
Yes
Yes
1 Year Warranty
Yes
Yes
Ambient, Cold, and Customizable Hot Water Temperatures
No
Yes
Hydrogen Infused, Negative ORP
No
Yes
Touch Screen Panel With Water Quality and Hydrogen Content Display
No
Yes
Smart Water Dispensing
No
Yes
¼ Turn To Remove Easier Filter Changes
No
Yes
UV Light
No
Yes
Remote Control Via RKIN App
No
Yes
The details: U1-W dimensions W 9.5 in, H 17 in, D 19 in; weight 26 lbs; color black; on the turntable, a 21 in round base and 18.5 in height.

Intelligent Touch Control Panel

U1 touch control panel diagram with the display, indicator lights and buttons
Notifications
Filtering

U1 is actively filtering water.

No Water

No filtered water is left. Refill supply tank.

0000-9999

Alphanumeric notification display:

  • Shows water temperature in F (Fahrenheit) when one of the water temperature buttons is pressed
  • Water volume in ounces
  • Hydrogen content in PPB (parts per billion) when hydrogen function is ON
  • TDS (total dissolved solids) in PPM (parts per million) when hydrogen function is OFF
  • Water cooler - OFF when turned off (press and hold the “Cold” button to turn on), PREP while cooling, and COOL once the water has reached maximum cold temperature when the “Cold” button is pressed
Filter Life 1 2 3

Filter life replacement notification - Filter 1, 2, and 3. Lights up white during normal operation. Once filter life reaches 80%, the light turns yellow. The indicator light will turn red when the filter life has reached the end.

Fresh Water

The supply tank is ready for a refill.

Error

The system error occurred and the error code is shown on the Alphanumeric display.

Buttons
Hydrogen
  • Lights up blue
    • When hydrogen functionality is ON, the Alphanumeric display shows hydrogen content in PPB.
  • Lights up white
    • When hydrogen functionality is OFF, the Alphanumeric display shows TDS content in PPM.
Power (Always on, lights up white)

Indicates that the system is plugged into the electrical outlet. Press and hold to turn the standby mode ON or OFF.

Reset

Once the filter(s) has been replaced, reset the filter life indicator by pressing and holding the “Reset” button for 3 seconds, then select the filter element by pressing on the “1”, “2”, or “3”. Once the desired filter has been selected press and hold the “Reset” button again for 3 seconds to complete the filter life indicator reset.

Small Cup

The preset amount is 5 fluid ounces, with adjustment to 7, and 9 by pressing “-” or “+”.

Big Cup

The preset amount is 10 fluid ounces, with adjustment to 12, 14, and 16 by pressing “-” or “+”.

Small Cup And Big Cup

Press and hold Small Cup and Big Cup together to dispense all filtered water within the system - 1/2 gallon.

Rinse

Rinse cycle to drain the system and flush the filters, duration about 6 minutes.

Lock

Press the lock button to unlock. This is used for coffee, tea and hot temperatures.

Normal

Ambient temperature water.

Cold

Cold temperature water - 59 F.

Milk

Baby formula temperature water, by default 118 F, with adjustment from 109 to 127 F by pressing “-” or “+”.

Coffee

Must press the “Lock” button to use. “Coffee” temperature water, by default 185 F, with adjustment from 167 to 185 F by pressing “-” or “+”.

Tea

Must press the “Lock” button to use. “Tea” temperature water, by default 194 F, with adjustment from 176 to 203 F by pressing “-” or “+”.

Hot

Must press the “Lock” button to use. “Hot” - boiling temperature water, by default 212 F, with adjustment from 194 to 212 F by pressing “-” or “+”.

−

Reduces water volume and temperature adjustment.

Dispense
  • Turns red when dispensing hot water.
  • Stays white when dispensing ambient temperature water.
  • Turns blue when dispensing cold water.
  • Press to dispense water.
+

Increases water volume and temperature adjustment.

Wifi

Enables remote monitoring and control of U1 functions through the RKIN app, including water volume, temperature control, and filter status checks.

Is U1 tested by a third party?

U1 is 3rd party tested for the reduction of TDS, Fluoride, Lead, PFOA/PFOS, Hexavalent Chromium, and Trivalent Chromium.

How do I download the RKIN app, and why should I use it?

Download the RKIN mobile app. It is available on the Apple App Store (iOS) and Google Play Store (Android).

The RKIN app has the same functionality as the physical control panel.

Checking water quality while away or even resetting the filter change notification is as simple as pressing a button.

You can also dispense water from U1-W remotely via the app. Why? Because you can.

View the U1-W app pairing guide video.

What are the dimensions of the U1?

9.5 Inches Wide, 17 Inches High, 19 Inches Deep, 26 lbs.

Dimensions with turntable(optional, not included): Turntable base - 21" round, Height 18.5"

How long does it take to heat water to boiling temperature?

U1 uses instant-hot technology. Hot water is immediately available even at boiling temperatures, limited only by a total system max volume of ½ gallon.

How long does it take to cool water, what is cold water volume, and can cold water temperature be adjusted?

It takes about 15 minutes to cool 15 ounces of water at a time to 59F/15C. When the cold water button is pressed, U1 will display “COOL” once the water temperature has reached maximum cold or “PREP” if cooling is still in progress. No need to wait for the cooling process to complete; cold water can be dispensed at any time. Cold water temperature is not adjustable.

Can the water cooler be turned off for energy-saving purposes?

Yes, press and hold the “cold” water button for 5 seconds to turn off or turn the water cooler back on.

What negative ORP(Oxidation-reduction potential) readings can I expect from U1 hydrogen-enriched water?

During our internal testing, we got negative ORP readings from -330 to -347 on average. Individual results may vary.

Can the hydrogen function be turned off?

Yes, hydrogen production can be turned off or on with a press of a “hydrogen” button.

How much filtered water does U1 hold?

About ½ gallon of filtered water at a time. U1 filters ½ gallon of water in under 7 minutes. Twice as fast as Zero Installation Purifier. 

What is the pure water to waste water ratio?

1 Gallon of water is loaded into the system. U1 makes ½ gallon of pure water and another ½ of a gallon of wastewater with all the impurities in it. Since wastewater contains all the impurities, it’s NOT recommended for consumption. However, it can be used to water plants, rinse vegetables, etc.

Does the wastewater mix with the intake water and is filtered over and over as it’s common with other systems?

No, all the wastewater is deposited into a separate section of the supply tank and is no longer used for pure water production.

How often do the filters need to be changed and how much do they cost?

Please refer to the section below for all details on the replacement filter cartridges.

How do I order replacement filter cartridges?

If you sign up for our filter subscription program during checkout, the replacement cartridges will be delivered to you every 12 months automatically. Otherwise, replacement cartridges can be ordered on our website or over the phone.

Does U1 use proprietary filters available only from RKIN and reseller partners?

Yes, we designed our own filters to make filter changes as easy as possible with ¼ turn to remove and leak-free features.

Does U1 remove the "XYZ" contaminant?

3rd party tested for the reduction of TDS, Fluoride, Lead, PFOA/PFOS, Hexavalent Chromium, and Trivalent Chromium.

U1 uses a multi-stage reverse osmosis technology. Reverse osmosis is one of the best ways to purify water when it comes to cost per gallon, speed, and purity of the water. Undersink reverse osmosis water filters have been around for decades and have been extensively studied by the scientific community.

Because of U1’s unique design, preventing back-pressure within the RO membrane, it performs as well or better than most high-quality under-sink reverse osmosis systems.

The second stage - Carbon Block pre-filter alone tackles a multitude of contaminants even before they get to the reverse osmosis membrane.

But we understand that you may want to do your own research. So the fastest way to get an answer is to do an online search for "reverse osmosis removes XYZ" and review scientific papers. Replace "XYZ" with a contaminant of your choice. Or you can always contact customer support.

Does U1 work with 220V electric outlets?

No, the current version is suitable for 100V-120V electric outlets only - USA, Canada, Mexico, Japan, etc. However, 3rd party 220V to 120V voltage converters can be used. Must be rated for 1500 W continuous power.

Is it possible to switch to metric measuring units?

U1 will only display imperial units for temperature - Fahrenheit and ounces for water volume.

What if I have questions or need support?

You can always call us at 1-800-803-4551 Monday through Friday, 9 AM-5 PM EST, or submit a request to customer support.

Consumables and Replacement Cartridges

Your water quality may affect the longevity and replacement frequency of the filters.
1–2 First and Second Stage Filtration

U1-W RKIN 2-in-1 Sediment and Carbon Pre-Filter QT Series

RKIN 2 in 1 Sediment and Carbon Filter QT Series
MPN: RC-QT-PAC
Replace every 6-12 months or as needed
$44.86 Buy Now
3 Third Stage Purification

U1-W RKIN 200 GPD Reverse Osmosis Membrane QT Series

RKIN 200 GPD Encapsulated Reverse Osmosis Membrane QT Series
MPN: RC-QT-RO
Replace every 12-24 months or as needed
$82.99 Buy Now
4 Fourth Stage Filtration

U1-W RKIN AlcaPure Alkaline Post Filter QT Series

RKIN AlcaPure Alkaline Post Filter QT Series
MPN: RC-QT-CF
Replace every 6-12 months or as needed
$45.43 Buy Now
5 Fifth Stage

U1-W RKIN PEM Hydrogen Module

RKIN U1 Hydrogen Module
MPN: RC-HGPEM
Replace every 6-12 months or as needed
$54.70 Buy Now
U1-W 2-Year Filter Cartridge Bundle

U1-W 2-Year Filter Cartridge Bundle

$372.97 $334.95 Buy Now
U1-W 1 Year Extended Warranty

U1-W 1 Year Extended Warranty

$59.99 Buy Now
Specs

RKIN U1-W Countertop Water System Manual

3rd party tested for the reduction of TDS, Fluoride, Lead, PFOA/PFOS, Hexavalent Chromium, and Trivalent Chromium

For indoor non-commercial applications only:

  • Use room temperature water 20-26°C (68-78°F)
  • Ambient Temperature: 4-40°C (40-104°F)
  • Input Power: 100-120V 60Hz
  • Rated Power: 1500W
  • Rated Heating Power: 1400W

Inlet water quality limits:

  • Max Total Dissolved Solids (TDS) 800 mg/L
  • Max Hardness 25 gpg (428 mg/L)
  • Sulphide, Iron & Manganese <0.1 mg/L
  • Chlorine <4 ppm
  • pH 3-11
  • Turbidity 5 NTU Max
Shipping & Delivery

Free standard shipping within the contiguous United States (lower 48 states).

Orders are usually shipped the same or the next business day and delivered within 2–5 business days. Some deliveries, including international orders, can take 7–14 business days. Subject to in-region item availability and seasonal carrier shipping performance.

Order tracking numbers are emailed as soon as they become available. If you do not receive your tracking number within 24 business hours, please check your spam folder.

Best Price Guarantee

We want you to feel confident you're paying the best price. If you find a lower price within 1 year of your order, we'll refund the difference.

  • Price drop on rkin.com: If rkin.com lowers the price of the item you ordered within 1 year of your order date, we'll refund the difference.
  • Lower price from another retailer: If an authorized U.S. retailer advertises the same new RKIN product, in stock, for less within 1 year of your order date, send us the link and we'll refund the difference.

How to claim: Contact us within 1 year of your order date with your order number. For another retailer, include a link or screenshot of the offer. We refund the difference to your original payment method.

Not included: announced sales and promotions (on rkin.com or at another retailer), including Black Friday, Cyber Monday and holiday sales; refurbished items; coupon codes, gift-with-purchase offers, and shipping or tax differences. One price adjustment per item.

Warranty & Returns

You get an unconditional 1-year satisfaction guarantee, which includes a warranty for the same period.

Free shipping on warranty replacements. Learn more about the 1-year satisfaction guarantee

Real Reviews from Real Customers

Customer Reviews
4.7 Based on 105 Reviews
85% 
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Customer Photos
U1 Space-Saving 4-in-1 Water Filter System - Customer Photo From Laquan Gasawayi
U1 Space-Saving 4-in-1 Water Filter System - Customer Photo From marti
U1 Space-Saving 4-in-1 Water Filter System - Customer Photo From Briti
94reviewers would recommend this product