Do *NOT Buy Until You Read This Kube Water Filter Review

Article Last Updated: September 2022

Kube water filter is growing in popularity because it is promoted as being certified to filter more contaminants than almost all other filters.

One of its biggest selling points is that Kube is WQA certified. Its certification and awards means that it meets NSF / ANSI standards to remove many contaminants from your water.

This includes the ability to remove lead by up to 99%.

The Kube water filter works without taking too much space as it easily hooks up under any sink. This means that it doesn’t take up any counter top space.

Apart from drinking better water that is contaminant free, it means that you can cook without chemicals, fill up your water bottle with impurity-free water. Using high quality purified filtered water can also enhance and improve the taste of hot beverages like tea and coffee.

The Kube filter marketing material promises that the filters will last for 6,300 liters before you need to replace the cartridges.

This review will look at all the big claims made by Kube and determine if the Kube water filter is worth it or not.

Kube Water Filter

You probably use your tap everyday without even thinking about it. Everything from cooking, watering your plants, filling your pet’s bowl, washing dishes, filling up the kettle to drinking.

All of these activities will be improved if you have access to the best quality water. The Kube water filter promises to do this as well as providing you with a number of other benefits:

Green Plus ArrowCompact space saving design. The Kube filter is small enough to fit under your sink and therefore leaves your countertop with more space.

Green Plus ArrowComes with a flat top which you can possibly use for storage.

Green Plus ArrowTracks the filter life with an indicator.

Green Plus ArrowBoth filters have a user friendly twist and lock design. This also means that the filters will always be properly connected without any leaks.Read Reviews Compare Prices

Green Plus ArrowNo power outlets or electricity required because it’s a 100% hydraulic system.

Green Plus ArrowIts smooth surface means that it’s easy to clean.

Kube Water Filter System Review

If you have ever had a reverse osmosis system and think that it works too slow, then you might consider getting something like a Kube. The marketers behind this product highlight that it’s much faster than regular reverse osmosis.

If you are tired of waiting for the starter to fill up and you have opted out of a reverse osmosis system, take a look at Kube.

Kube is WQA certified to meet NSF / ANSI standards to remove many contaminants from your water. Including the removal of up to 99% of the lead from your drinking water.

It can be easily and conveniently installed under almost any sink so that filtered water is released from your existing faucet.

Kube promises to improve the quality, taste and the smell of your drinking water and gives you the confidence that you have done more to improve the water quality.

Kube Advanced Water Filtration System Highlights

Green Plus ArrowFast and easy installation that takes around 15 minutes.

Green Plus ArrowGood level of elimination of contaminants including lead.

Green Plus ArrowThe compact Kube system design is specially create to easily fit in with most sinks and connects directly to the faucet.

Green Plus ArrowCost efficient operation as it only costs around 4 cents per gallon in terms of the Kube cartridge filter.

Green Plus ArrowIt will also tell you when to replace the cartridge through its display.

Green Plus ArrowThe rotate and lock design of the Kube filter cartridge makes changing filters quick, secure and easy.

H: 13.1 inches.

W: 6.2 inches.Check Prices & Read Customer Reviews

Fitting Size: .375 inches.

Weight: 9.2 pounds.

Kube Water Filter Product Details

Max Feed Pressure125 psi
Max Feed Temp120°F
Min Feed Pressure35 psi
Number of Filters2 (included)
Filter Stages1
Filter TypeSpecialty Carbon Media Composite.
Filter Life1,665 gallons (approximately).


What Does Kube Filter?

Heavy MetalsMercury, Lead
Odor and taste.Chlorine
Gasoline AdditivesToluene, MTBE (Methyl Tert-Butyl Ether), Benzene, Xylene, Benzene
PharmaceuticalsTranquilizers, Antidepressants, Antibiotics, Birth Control, Pain Killers
Herbicides and PesticidesSimazine, Lindane, Carbofuran, Methoxychlor, Atrazine, Endrin, Alachlor
ParticulatesRust, Silt, Sand
Microbial CystsGiardia, Cryptosporidium
Industrial PollutantsEthylene Dibromide (EDB), Chlorobenzene, Carbon Tetrachloride, Tetrachloroethylene (TCE), Styrene
Disinfection By-productsDibromochloromethane, Bromodichloromethane, Bromoform, Tribromoacetic Acid, TTHMs (Total Trihalomethanes), Chloroform

Kube Water Filter Installation

The video above shows how relatively easy it is to install. It goes under your kitchen sink and you will need to know how to turn off the water from the mains. You may also need some basic DIY equipment like a wire cutter.

If you are unsure, then hire a professional plumber that will be happy to do this for you at a low cost.

Dashed Line

Is Kube Water Filter WORTH It?

Based on the numerous positive customer reviews, it seems that Kube is worth it. However, it’s NOT available on other eCommerce platforms like Amazon. You’ll need to go directly to the Kube website or try to get it cheaper on eBay.

Best Kube Water Filter Alternative?

Mr Water Geek ThinkingAlthough the Kube seems to do a reasonably good job there are better options out there.

Especially if you want to enjoy the benefits of alkaline water with a hydrogen boost.mrwatergeek winner badge

New academic research is showing these new types of water can have significant and interesting health benefits.

If this is of interest then there are many better offers available today. OptimH2O Reverse Osmosis

This is in terms of an under counter reverse osmosis machine connected to your water mains supply.

Green Plus ArrowGet fresh clean water in a few seconds.

Green Plus ArrowReal tankless design – no bacteria breeding.

Green Plus ArrowSmart faucet real time also included in the pack.Check Prices & Read Customer Reviews

Green Plus ArrowRemoves all viruses and bacteria and it prevents them from building up.


  1. Aloha Mr Water Geek 🙂

    On Oahu, we’ve had a fuel storage tank leak into an aquifer that is a main source of drinking water.

    Can you recommend a filtration system for the sink that can specifically filter petroleum. A recent test showed double the concentration of the acceptable limit. They have stopped pulling from some sources and are flushing the system, but for ease of mind, I’d like install something at home.

    I have seen petroleum solvents and gasoline additives listed as being filtered, but is there something more specific I should be looking for?

    You can google this star advertiser article to read more…
    Board of Water Supply shuts 2 wells as precaution after Navy discloses diesel fuel in water from another shaft

    Mahalo for your time in advance!!

    1. Aloha Beth

      It’s a tricky one because hardly any water filter device will list petroleum as something that it can filter even if it can (because it’s so unusual).

      I would look into reverse osmosis because it filters out everything (including minerals). However, most modern reverse osmosis devices also re-mineralise with healthy minerals like calcium, potassium, magnesium etc so the water you drink is still nourishing (like this).

      You may want to consider a 5 stage RO system (e.g. this one) if you have a larger home / high water usage.

      Stay hydrated,

  2. Hi Luke,

    I really like your site and honest feedback/research you provide. Do you have a ranking of the top 3 reverse osmosis systems you recommend? I currently have an I-Spring 5 stage and just recently did a TDS on the water and saw it read 82. Although 82 isn’t bad? I had hoping for ~10 being that I had a 5 stage “good quality” system. What 3 reverse osmosis systems/brands do you recommend as I am thinking of moving my ispring that’s in the kitchen to the basement and buying a new reverse osmosis system.

    1. Hi George

      A TDS of 82 is generally not that bad and TDS is also not an accurate indication of contamination levels.

      However, I personally prefer the Aquasana OptimH2O because it effectively treats very harmful chemicals ( e.g. lead, asbestos etc) but also re-mineralizes by adding healthy minerals back into the water. This gives a fresh crunchy taste to the water.

      I personally use Aquasana products and know people who work in the company so I’m perhaps biased but their RO system has a 90 day guarantee so one could return it if they ended up hating it for any reason.

      Stay hydrated

  3. Hello – do you know of a GOOD, USEFUL water filter that can be applied directly to the shower in order to remove limescale, chlorine and so forth? There are a lot out there but I have doubts on whether the filtering actually works. Thank you! (Wanted to contact you directly but there is no longer a form..)

    1. Hi Si
      You are right to be skeptical most shower filters don’t filter anything and only get good reviews because people find them “easy to install” or because they “look good”.
      I recommend you get a shower filter that comes with a guarantee of what it can remove and use a water test kit to make sure the guarantee is honest. I did a review a while back and found the Aquasana Shower Water Filter to be the best but make sure you use a water test kit with which ever one you choose.
      Best wishes,

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About The Author

About The Author Of This Post

I'm Luke and I enjoy researching, testing and writing about water treatment products. Read full bio.