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Zero Installation Purifier Countertop Reverse Osmosis Water Filter

819 reviews
Regular price $439.95
MSRP $844.74 Regular price Price $489.95
Sale price Sale $439.95 Save 48% Sold out
  • Transforms ordinary tap water into pure, healthy, and delicious drinking water.
  • AlcaPure Edition for Alkaline pH or OnliPure Edition for ZERO TDS.
  • Certified by IAPMO R&T to NSF/ANSI 58 for the reduction of TDS, Fluoride, Lead, PFOA/PFOS, Hexavalent Chromium, and Trivalent Chromium.
  • Perfect for apartments, condos & RVs.








As seen on AMC's NewsWatch TV

Countertop Water Filter

Delicious Purity

AlcaPure Edition Filtered Water has a small amount of Calcium and Magnesium Minerals returned back to purified water to give you a taste comparable to your favorite bottled water: Alkaline 7-8pH, with beneficial minerals added.


OnliPure Edition Filtered Water brings the TDS reading to zero. Zero TDS or Total Dissolved Solids is perfect for people who want Absolute Purity.

Beautiful Convenience

Works just like your coffee maker. No messy hoses and leaky diverter valves that fail all the time. Just fill the bottom pitcher with water from your kitchen faucet, push the button and walk away.

In about 15 minutes you will have a 1/2 gallon of pure alkaline water in the top dispenser for you to use.


- Portable
- Dimensions: W 9.5", D 14.5", H 16.25"
- Will look great in your home or office

Design and Efficiency

Will look great in your kitchen. There are no leaky diverter valves or bulky hoses to attach to your faucet.

Since water is loaded and dispensed from the front of the unit, you can place it even in the tightest spaces imaginable. No additional top or side clearance is required.

Uses only 24W of power, less than a light bulb and has 50% (1:1) recovery rate – best among reverse osmosis filters.

Pure Water Made Simple

No need to waste your time waiting for the filtering process to complete.

Fill the bottom container with 1 gallon of tap water, push the button and walk away. In about 15 minutes, the top container will be filled with 0.5 gallons of purified water and the unit will turn itself off.

Top and bottom BPA-FREE containers can be easily removed and cleaned with dish soap.


Intuitive single-button operation
CE certified pump for quiet performance
High capacity, easy to change filters
LED indicator for status & filter change notifications
Removable pure water tank for easy cleaning
CE & RoHS certified 110V or 220V compatible adapter


Countertop Water Filter


US PATENT: 8945377B2

For more information on filter replacements, please see Frequently Asked Questions below.

STAGE 1 – Five Micron Sediment Filter

Unique gradient pore structure traps larger particles in its outer layer and smaller ones in the inner layer, effectively removing particles such as sand, sediment, and rust.

STAGE 2 – Activated Carbon Block Filter

Coconut-based activated carbon block filter with high adsorption capability removes harmful chemical residues and carcinogens such as VOCs, THM’s, pesticides, eliminating foul odors, bad taste.

For use with extremely hard water Anti-Scale carbon filter alternative is available.

STAGE 3 – Reverse Osmosis Membrane

NSF/ANSI 58 Certified reverse osmosis membrane with 75 Gallon Per Day filtration capacity purifies water by blocking virtually all the harmful contaminants. It’s the heart of the reverse osmosis system.

STAGE 4 – Choice of Exclusive Post Filter

OnliPure™ The specialty Ion Exchange Media inside our OnliPure Post Filter reduces any left over contaminants after the Reverse Osmosis process to zero TDS. Measure and confirm from your home with a simple TDS meter.

- OR -

AlcaPure™ Polishing Alkaline Post Filter 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.


Total Dissolved Solids Or TDS

is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid. TDS is sometimes referred to as parts per million (ppm). You can test water quality levels using a digital TDS meter.

Primary sources for TDS in Receiving Waters

are agricultural & urban runoff, clay-rich mountain waters, leaching of soil contamination, & point source water pollution discharge from industrial or sewage treatment plants.

TDS in parts per million (PPM)

Chart values represent national U.S. averages. Actual TDS levels for geographic regions may vary.


How does your water measure up?

TDS meters measure your water quality using PPM, or parts per million, to give you your water’s “purity score.”

Because we want you to be aware of your water quality, we would like to offer you a FREE TDS meter with a Zero Installation Purifier purchase. Just cover $4.99 shipping for the TDS meter as these two items are shipped from different distribution centers.

Get this TDS meter and find out how your water measures up using the chart above.

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Is Zero Installation Purifier Certified by a third party and BPA free?

Yes, Zero Installation Purifier is made with BPA-free plastic and certified by IAPMO R&T to NSF/ANSI 58 standard for the reduction of TDS, Fluoride, Lead, PFOA/PFOS, Hexavalent Chromium, and Trivalent Chromium. Please click here to view the certification listing page and click here for individual contaminant reduction rates.

What are the dimensions of the Zero Installation Purifier?

A: 9.5 inches Wide, 16.25 inches High, and 14.5 inches Deep.For mobile devices, view the Zero Installation Purifier in your space, via Augmented Reality (AR), by tapping a 3D model below.

What is the difference between AlcaPure and OnliPure Editions?

AlcaPure Edition post filter returns Calcium and Magnesium minerals back to water once it has been purified by Reverse Osmosis. This increases the pH to an alkaline level similar to spring water.

OnliPure Edition post filter does exactly the opposite - reduces even the tiniest amount of TDS left over after the Reverse Osmosis to zero. This provides lab-grade purified water quality similar to distilled water. Slight variations in the calibration and accuracy of different TDS meters may result in the TDS reading of 1 or 2 PPM.

For most People, AlcaPure Edition Zero Installation Purifier is the right choice, unless you have been accustomed to distilled water taste.

What if I want to switch editions of the Zero Installation Purifier later?

Switching from the AlcaPure edition to the OnliPure edition, or vice versa, is as easy as ordering a different post-filter and clips for attachment. Filters and attachment clips are available here.

How long does it take to fill the top tank with purified water?

It depends on water quality you use to make purified water and might take up to 20 minutes. On average about 15 minutes.

How much filtered water does the top tank hold?

1/2 Gallon of filtered water.

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

Every 12 Months.

AlcaPure Edition bundle: $69.95 per complete set of 3 filters consisting of two pre-filters and one AlcaPure post filter.

OnliPure Edition bundle: $89.95 per complete set of 3 filters consisting of two pre-filters and one OnliPure post filter. Depending on local water quality, filters may need to be replaced more often to maintain 0 TDS.

Getting an abnormal filtered water taste is a good indication that the OnliPure Ion-Exchange post-filter has been exhausted and needs replacement.

How often does reverse osmosis membrane need to be changed and how much does it cost?

Every 2-4 years. You will know right away if the membrane has failed because the unit will not function as usual. Example: There is less filtered water in the top tank. Zero Installation Purifier Reverse Osmosis Membrane costs $69.95.

How do I order replacement filters?

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

Does Zero Installation Purifier use proprietary filters available only from RKIN and reseller partners?

Yes, we designed our own filters to make filter changes as easy as possible.

Does Zero Installation Purifier remove the "XYZ" contaminant?

Zero Installation Purifier 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 Zero Installation Purifier’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.

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 our customer support here.

What is the warranty on Zero Installation Purifier?

You get an unconditional 1-year money-back guarantee, which includes warranty for the same period. We will even cover return shipping if the product is returned within 30 days of purchase. Free shipping on warranty replacements. Learn more

What if I have questions or need support?

Please get in touch with us by clicking here.


If the water being filtered is from a public water supply, it will comply with requirements and your RKIN Zero Installation Purifier will substantially improve the water quality.

Certified by IAPMO R&T to NSF/ANSI 58 standard for the reduction of TDS, Fluoride, Lead, PFOA/PFOS, Hexavalent Chromium, and Trivalent Chromium. Please click here to view the certification listing page and click here for individual contaminant reduction rates.

For indoor non-commercial application only:

Use room temperature water 20-26°C (68-78°F)
Ambient Temperature: 5-45°C (41-113°F)
Input Power: 100-240V 50/ 60 Hz
Electrical operation: 24VDC, 24 W

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.

Recovery Rating Efficiency Rating Production Rate



45.4 Gallons Per Day

Your water quality may affect the longevity and replacement frequency of the filters.

First Stage Filtration - 5 Micron Filter. MPN: RC-FT-82. Replace every 12 months or as needed.

Second Stage Filtration: - Carbon Block Filter. MPN: RC-FT-92. Replace every 12 months or as needed. Or Anti-Scale Version of Carbon Block Filter. MPN: RC-FT-90. Replace every 12 months or as needed.

Third Stage Purification - 75 Gallon Per Day RO Membrane. MPN: ZIPM75. Replace every 24 months or as needed.
Hardness over 10 gpg (171 mg/L) may reduce the lifespan of the RO membrane. If the filtered water production decreases over time, please replace the RO membrane and substitute 2nd stage Carbon Block filter with PPH Anti-Scale Carbon filter to prevent premature RO membrane failure due to hardness build up.

Fourth Stage - AlcaPure Post Filter, MPN - RC-ZIPFAP, Replace every 12 months or as needed. OnliPure Post Filter, MPN: RC-DIPFL2.5x10. Replace as needed.

Free standard shipping within US and Canada.

Orders are usually shipped the same or the next business day and delivered within 2-5 business days. RKIN fulfilment network is able to deliver Zero Installation Purifier to 95% of US population within 2 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.

We work diligently to make sure that we offer the best prices for our products online. If you come across another retailer offering a lower price for our products than we are within 12 months of your purchase date, please let us know and we will refund you the difference in price.

We want you to feel confident that you are getting the absolute best price for the product you are ordering from us. If you find that our own website,, has lowered the price for the same item you ordered within 12 months of your purchase date, please let us know and we will refund the difference in price.

You get an unconditional 1-year money-back guarantee, which includes warranty for the same period. We will even cover return shipping if the product is returned within 30 days of purchase. Free shipping on warranty replacements. Learn more


✔️ Alkaline or Zero TDS Filtered water
✔️ Portable and convenient countertop system
✔️ No more shopping trips just to buy bottled water
✔️ When water tastes this good, you will hydrate more
✔️ Better tasting coffee, tea, and food
✔️ Ready for use out of the box with all the filters pre-installed
✔️ Ships the same or the next business day
✔️ 1-year warranty
✔️ 1-year money-back guarantee

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Cover $4.99 shipping for the TDS meter as these two items are shipped from different distribution centers. New customers only. Limit 1. While supplies last. Not valid with any other offers.






Customer Reviews
4.7 Based on 819 Reviews
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Amy A.
United States United States
I recommend this product

Fantastic table top filter

I have had my Alcapure for over 2 years now and I couldn’t be happier. Many moons ago I worked for a water treatment company and quickly learned what is lurking in our drinking water. I rent, so having a whole house RO system or under sink system is not an option for me. I was going through 1-2 cases of RO filtered bottle water a week. I felt terrible about the waste, but wanted clean drinking water. I finally stumbled upon the RKIN website and saw these table top filtration units. At first I couldn’t justify the price tag and then I did the math…totally worth it. The first unit I had started leaking about 10 months in. I contacted RKIN customer service (very responsive and helpful) and they tried to troubleshoot the problem. We couldn’t fix it, so they sent me a replacement at not cost. I have had the 2nd unit for well over a year now problem free. I have had to change the filters once (the yellow light comes on), but have yet to change the RO filter. The RO filter really does last a long time. I live in CA and the water is super hard. My TDS reading out of the faucet is always over 750. After running it through the unit the TDS reading is around 50-60, and that’s after remineralization. Impressive consistent performance and great filter life. If you own a home look into a whole house RO system. If you can’t afford a whole house system then get an under the sink system in your kitchen for drinking water. If you rent, have an RV, or just don’t want to hassle with installing something then these RKIN table top units are a perfect fit. Based on my experience I highly recommend RKIN. RKINs customer service has been top notch and the Alcapure has exceeded my expectations. Zero Installation Purifier Countertop Reverse Osmosis Water Filter Review

Thank you so much for your review.

Tzu E.
United States United States
I recommend this product


I tested OnliPure with my TDS meter, side-by-side with my Berkey filter and WholeFoods 365 distilled water, both OnliPure and 365 distilled water shows 0 TDS!!! I thought maybe something is wrong with the meter, so I put it into the water my Berkey (just changed the filters black berkey and fluoride filters two weeks ago), and the Berkey water shows around 442-450 on the TDS meter, and then I put the meter back into OnliPure water, the reading is back to ZERO, so I am sure this RKIN OnliPure machine I just got a few days ago IS WORKING AS EXPECTED. I am satisfied with the result and the test of the OnliPure water, I let my family members taste them, they liked the taste, it's pretty much the same the distilled water (I thin because the WholeFood distilled water has a taste, but the Arrowhead distiled water doesn't have that taste). So, we liked the taste of the OnliPure water.

Micah C.
United States United States
I recommend this product

Best Countertop RO System

Easy to set up and use. Lowers TDS from 700 to 100 and pH above 7.0. Water tastes great, better than tap or bottled. Excellent customer service. Couldn’t be happier with this product and highly recommend.


Thank you for your review.

Joseph K.
United States United States
I recommend this product

Unit Arrived Broken

Not great. The unit arrived and wouldn’t power on. I was just told to take it back to ups with a new label they provided. I don’t have a car or printer at the moment so I had to rent a car for the day to take it to UPS and pay for printing. It’s disappointing I have to spend money as a customer on behalf of a mistake someone else made. I’m not pleased. And now I still don’t have clean water- I had to buy another plastic gallon to last me until who knows when. I’ll receive another unit. I would still love to talk to someone further but no one can seem to help me.

United States United States


I purchased my RKIN September 2020. Set up was very, very easy. I bought the Onlipure by mistake, so I called RKIN at that time, and they sent me the Alcapure free of charge :) :) I decided to keep using the Onlipure though, mainly because the idea of swapping out a filter in my brand-new machine was too intimidating, since I'd just gotten it... The Onlipure is the same as drinking distilled water, but I still enjoyed it. At the one year mark, I just needed to tighten up a loose spigot, and had a minor issue with a metal outlet piece poking out and catching on the bottom reservoir as I pushed it in. I got help from RKIN for that. In April 2022, I finally got the blinking red light to replace the pre-filters and the post filter. Shipping was delayed, but I still received them close to the two week time period they stated (about a week after...). You can only buy the filters in a three-pack, so my free Alcapure is still unused, but that was by my choice... The factory-installed filters were ******* in very tight. And I mean, VERY TIGHT! Yikes. I didn't have a strap wrench so I googled it online and one of the tricks they mentioned was using a hair dryer to warm up the plastic housing and filter. After doing that and tapping on them lightly with the rubber handle of my screwdriver, they finally unscrewed (yay!) -- but it did take a little elbow grease. The post filter was much easier. **Make sure you purchase the proper size clamps along with your new filters if you are replacing the Onlipure with the Alcapure!** The cartridges are different sizes. Once everything was back in place I reset the red light and ran it through twice. The first time it only filled barely half. The second time a little bit more, and the third time it was working perfectly. Per instructions I drained the machine of excess water and air before replacing everything, so the internal hoses/system needed time to completely fill in again, I guess. The Alcapure water taste is fantastic! A real change from the Onlipure. I grew up near a natural spring, and this tastes like that, especially after I pitcher it and let it chill: SO GOOD. All in all, I have been extremely happy with my RKIN filter. I feel better, my skin looks better; I even got my housemate who doesn't drink water to try it, and she liked it, too. My RKIN has more than paid for itself with the almost two years of use. I recommend it to everyone I know! Thanks RKIN, for making such a great (and nice-looking!) RO Filter...

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