RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W feature guide
RKIN U1-W filtration and dispensing overview
RKIN U1-W intelligent touch control panel guide
RKIN U1 comparison chart
RKIN one year satisfaction guarantee graphic
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W Space-Saving 4-in-1 Water Filter System
RKIN U1-W feature guide
RKIN U1-W filtration and dispensing overview
RKIN U1-W intelligent touch control panel guide
RKIN U1 comparison chart
RKIN one year satisfaction guarantee graphic

RKIN U1-W Space-Saving 4-in-1 Water Filter System

RKIN SKU: RKIN-U1-W
Price
Regular price $87500
Regular price $1,12547 Sale price $87500
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Countertop reverse osmosis | Model U1-W

Filtered water designed to fit smoothly into your daily routine

The RKIN U1-W combines a compact countertop footprint with hot, cold, room temperature and hydrogen enriched filtered water. Its refillable design requires no permanent plumbing and makes daily access simple while keeping space, feed water and maintenance needs clear from the start.

Five treatment stagesNo faucet or drain connectionHot, cold and room temperature dispensingHydrogen enriched optionRKIN app compatible

The RKIN U1-W combines reverse osmosis, UV treatment, remineralization, hydrogen generation and temperature controlled dispensing in one refillable countertop unit. Fill the removable feed tank, place it on the system and select cold, room temperature, hot or hydrogen enriched filtered water from the touch panel.

Designed for small spaces

No permanent faucet connection or drain line is required. The 9.5 inch wide footprint is intended for indoor, noncommercial use.

Temperature choice

Dispenses cold filtered water and customizable instant hot water for tea, coffee and everyday use, plus room temperature dispensing.

Monitor at a glance

The touch panel displays filter status and water quality readings. App controls are compatible with the U1-W model.

RKIN U1-W countertop advanced filtration system
Countertop U1-W system overview.
RKIN U1-W countertop water system in a home setting
Compact countertop placement.
RKIN mobile app controls for the U1-W water system
App monitoring is listed for the U1-W model.

Who it is for

  • Renters and homeowners who want countertop RO without changing plumbing.
  • Individuals, couples and smaller households comfortable refilling a one gallon feed tank.
  • Home offices, offices and indoor spaces with suitable counter clearance and a properly rated outlet.
  • People who regularly use both chilled and heated filtered water.
  • Buyers who value visible filter status information and U1-W app compatibility.
  • Users whose source water falls within the listed feed water limits.

Good to know details

Counter space

Allow at least 9.5 inches of width and 19 inches of depth, plus clearance for the 17 inch height, ventilation and feed tank access.

Electrical capacity

Confirm a nearby 100 to 120 V, 60 Hz outlet appropriate for the listed 1,500 W rated load and 1,400 W heating load.

Source water limits

Compare a water test with the listed feed water limits for TDS, hardness, chlorine, pH, turbidity, sulfide, iron and manganese.

Daily water volume

One one gallon feed tank produces approximately 0.5 gallon of filtered water and approximately 0.5 gallon of concentrate.

Temperature needs

Confirm that countertop hot, cold, room temperature and hydrogen enriched dispensing matches the household’s actual routine.

Replacement ownership

Confirm access to U1-W replacement filters and comfort with the listed replacement intervals.

Installation Steps

The U1-W is a zero plumbing countertop system, but it still requires suitable placement, electrical service and a source water match.

  1. Place the unit on a stable, level indoor counter with adequate clearance around the 9.5 in W × 17 in H × 19 in D cabinet.
  2. Connect it to a 100 to 120 V, 60 Hz outlet appropriate for the listed electrical load.
  3. Fill the one gallon feed water tank with water that meets the listed inlet water requirements.
  4. Place the tank on the unit and start a filtration cycle.
  5. Select the desired dispensing temperature or hydrogen enriched option from the control panel.
  6. Empty and refill the feed tank as directed in current product instructions.
Water use expectation: A full feed tank produces about one half gallon of filtered water and about one half gallon of concentrate. A typical half gallon filtration cycle takes less than seven minutes.
Fill the RKIN U1-W feed water tank
1. Fill the feed water tank.
Place the feed water tank on the RKIN U1-W system
2. Place the tank on the system.
Select a water temperature on the RKIN U1-W
3. Select a dispensing temperature.
RKIN U1-W optional turntable accessory demonstration
Optional turntable accessory demonstration.
RKIN U1-W temperature control demonstration
Temperature control demonstration.

Maintenance Guide

A countertop RO system trades permanent plumbing for hands on ownership. Expect to refill the tank, dispose of concentrate, monitor the filter indicator and replace treatment components on schedule.

Component Replacement guidance
Sediment + carbon filter Every 6 to 12 months
RO membrane Every 12 to 24 months
Alkaline post filter Every 6 to 12 months
Hydrogen module Every 6 to 12 months

Actual service life varies with water quality and use. Follow the filter status indicator and current product instructions.

  • Use replacement components specified for the U1-W.
  • Keep the feed tank and dispensing area clean according to current product instructions.
  • Monitor source water conditions because changes can affect performance and filter life.
  • Allow access above and behind the unit for refilling, cleaning and component replacement.
RKIN U1 replacement filter bundle components
U1 replacement filter bundle components.

Product specifications

Specification U1-W
Dimensions 9.5 in W × 17 in H × 19 in D
Unit weight 26 lb
Feed water tank 1 gallon
Filtered water production per tank Approximately 0.5 gallon
Electrical supply 100 to 120 V, 60 Hz
Rated power 1,500 W
Heating power 1,400 W
Intended use Indoor, noncommercial use


Feed water limits matter. Maximum TDS is 800 mg/L, hardness is limited to 25 grains per gallon, chlorine must remain below 4 ppm, pH must remain between 3 and 11, and turbidity must not exceed 5 NTU. Sulfide, iron and manganese must each be below 0.1 mg/L.

Room temperature inlet water should be 68 to 78°F, with an ambient operating range of 40 to 104°F. Use only water of known microbiological quality or water that receives adequate treatment before entering the U1-W.

Five treatment stages

1. Sediment filtration

Captures larger suspended particles before the primary treatment stages.

2. Carbon filtration

Reduces chlorine and helps protect the RO membrane.

3. Reverse osmosis

The membrane reduces total dissolved solids and selected dissolved contaminants.

4. Alkaline post filter

Adds calcium and magnesium after RO treatment to improve taste.

5. Hydrogen module

Produces the system’s hydrogen enriched, negative ORP dispensing option.

Reduction testing: Third party testing reports reductions in total dissolved solids, fluoride, lead, PFOA/PFOS, hexavalent chromium and trivalent chromium. Performance depends on feed water quality, operating conditions and timely filter replacement.
RKIN U1-W system details and filtration components
U1-W system details and filtration components.
Items included with the RKIN U1-W countertop system
Items shown with the U1-W countertop system.
Shipping, Returns, & Warranties

Orders Processing: Our chosen couriers, including USPS, UPS, and FedEx, consistently facilitate the delivery of your items from our warehouse. Please note that processing times may vary depending on the brand. All orders are processed and shipped within 1 - 5 business days.

Order Confirmation: As soon as you place your order, you will receive an order confirmation e-mail.  This means that we have received your order in our system and pre-authorized your card for the purchase.

30 Day Returns: If your order arrives damaged, we will exchange you a replacement. For more details, visit our Refund Policy Page.

View our Full Brand Warranty Page Here
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