Out of Stock

UltraStream Undersink – Hydrogen Rich Alkaline Water Filter

(27 customer reviews)


The UltraStream Undersink version is a simpler, far more affordable way to alkalize, ionize and purify water.

Using the world’s best leading-edge filtration media, the UltraStream Undersink produces the same alkaline, ionized, antioxidant water as water ionizers 4x times the price.

  • Removes Fluoride, Chlorine, Chloramines, Heavy Metals, Pathogens and much more.
  • Now with extra Virus Guardian filter layer.
  • Adds Beneficial Alkaline Minerals.
  • Produces Alkaline, Ionized Water.
  • Infuses water with Molecular Hydrogen.
  • Tested for the life of the filter (12 months or 3000 litres).
  • Comes with an under-sink connection kit and stylish vented faucet, in a choice of finishes.
  • Designed in Australia and tested for Australian water conditions. Manufactured in the USA.
  • 3 Year Warranty* conditions apply.
  • Easy to install Replacement Cartridge  Find out more
  • Includes first filter and pH Liquid Reagent Test Kit.
  • Also available in benchtop version

Paper Sediment Filter: for water supplies with higher-levels sediment (Recommend for most tank water). Find out more.
Extra Fluoride Removal: for water supplies with high fluoride levels or people who are extra sensitive to fluoride. Find out more.

UltraStream Undersink – Alkaline Water Filter

The UltraStream undersink version, unlike most other water filters, is tested for the filter life to remove a HUGE range of modern contaminants in your water. Incorporating the latest advances in water filter technology, UltraStream gives you great-tasting, safe, alkaline, ionized, hydrogen-rich water on tap in your home.

  • Available in benchtop and undersink versions to suit your kitchen.
  • Easy to install Replacement Filter.
  • 3 Year Warranty, conditions apply.
  • Manufactured in California, USA.

Learn more about the UltraSteam

Superior Water Filtration

  • Removes:
    • Chlorine and chloramines (ammonia is added to chlorine, to stay in the water longer).
    • Volatile Organic Compounds (VOCs).
  • Removes Heavy Metals:
    • Lead,
    • Aluminium,
    • Iron,
    • Zinc,
    • Copper,
    • and more.
  • Removes arsenic, pesticides, phosphorous, and halides, etc.
  • Removes fluoride.
  • Now with Virus Guardian – removes viruses, bacteria and cysts.
  • Softens the water.

Filter tested for the life of the filter (12 months or 3000 litres).

Learn more about Water Filters

Healthier, Alkaline Water

  • Adds beneficial alkaline minerals to produce Alkaline Water
  • Adds calcium and magnesium and trace minerals
  • Maintains potassium and sodium levels in water
  • pH up to 9 over the 3000 litres (may vary depends on the pH of the input water).

Learn more about Alkaline Water

Water Ionizer and Antioxidant Producer

  • UltraStream produces better alkaline, ionized, antioxidant, filtered water than electric water ionizers 4x times the price.
  • It is a far simpler and more affordable way to alkalize, ionize, and purify drinking water.
  • Gives consistent negative ORP over the life of the filter down to -500mV.
  • Supplies ‘on tap’ antioxidant negative ions in every glass.

Hydrogen-infused filtered water

  • Infuses your drinking water with anti-inflammatory Molecular Hydrogen.
  • The health benefits of H2 have been tested in Over 300+ published studies and 1000+ scientific articles.
  • View Molecular Hydrogen Institute website Studies page…

Learn more about Molecular Hydrogen Water.

Save money, help the environment

  • Saves you big money – cost is 28c/litre in the first year, 8c/litre after that;
  • Save thousands of single-use bottles from going into the environment.

Type of Water Conditions

  • Suitable for town and rain-water tank supplies.
  • If you use bore or river water (including well water) please contact us before purchasing.
  • Flush UltraStream water filter for 10-20 minutes before use.

Please note: Due to higher sediment levels in rural SA and WA water and in some rainwater tanks, it is strongly advised to install a paper sediment filter (select from pre-filter options at checkout) with your UltraStream Undersink version.

If you use bore water (well water) please email us or call us on 1800 268 469 before your purchase.


  1. These statements above have not been evaluated by the Food and Drug Administration or the Therapeutic Goods Authority.
  2. This product is not intended to diagnose, treat, cure, or prevent any disease.
  3. Please consult a physician or medical practitioner before taking any dietary supplement, especially if pregnant or nursing.


UltraStream FAQ's

  • Can you drink this water just like tap water… regularly or only a few litres a day?

    Yes, you can drink UltraStream water as you would drink regular tap water.

  • What happens if I run hot water through my UltraStream?

    This is not a problem although we wouldn’t recommend it on a regular basis. The UltraStream was not made to put hot water through it. However…

    When hot water runs through the filtration media in a cheaper filter it creates tunnels. When tunnels are created the water can run through without contact with the media which means it doesn’t get filtered anymore.

    We designed the UltraStream to make sure that hot water wasn’t able to tunnel. We use a  specially designed ‘spreader’ that forces the water to spread evenly which means that these tunnels just can’t happen. The negative side of any hot water intrusion is that hot water will ‘liberate’ some chlorine already accumulated so you’ll get high chlorine output while the hot water is passing through.

  • Why has the water slowed or stopped coming out of my UltraStream?

    It is likely you have accidentally turned off the water flow at the blue and white tap on the bottom of the UltraStream.

    To check to see if this is the problem:

    1. Turn your UltraStream on it’s side.
    2. On the bottom you will see a base plate with two holes.
    3. Put your fingers into these holes and pull the base plate off.
    4. Once you have done this you will see a blue and white tap.
    5. You can adjust this tap to any water flow you require:
      – The flow is on full when the tap is inline with the incoming hose.
      – The flow is off when the tap is 90 degrees from the incoming hose.
      You may need to turn it off and on if it doesn’t work straight away.

    OR the input hose feeding water into your UltraStream has become kinked. Follow the above instruction to check if the hose is kinked inside the base.

    OR if the UltraStream is installed under the sink you may have inadvertently pushed the Grey JG Converter in too far.

    In this case, please do the following as soon a possible:

    1. Turn off the cold water connector under the sink.
    2. Use the ‘John Guest’ spanner and take out the Grey ‘John Guest’ Converter on the top of the UltraStream. Check to see if you have the clear plastic tubing on the stem.
    3. Replace it with the spout.
    4. Put water through the UltraStream by turning the cold water connector back on (make sure you have the UltraStream on the sink of have a bucket for the water to flow into)
    5. If the water starts to flow again don’t reinsert the old Grey ‘John Guest’ Converter.
    6. Phone AlkaWay for a new Grey ‘John Guest’ Converter to replace your old one.

    OR if the above doesn’t work then it may have blocked up prematurely due to a municipal pipe flush which creates a lot of sediment in the water, or you may be overdue for a new replacement filter.

  • Why does the UltraStream spurt or splutter when I first use it in the morning?

    This is NOT air, it is the Molecular Hydrogen which is a gas.

    The spurting happens because Molecular Hydrogen has built up in the UltraStream overnight and/or when it hasn’t been used for a while.

    The first water that comes out of the UltraStream is the best as it will have the most of this anti-oxidant and anti-inflammatory quality.

    If you want to get the most Molecular Hydrogen from your water drink it fresh, straight from the UltraStream.

    It is like an orange; when an orange comes fresh off the tree and it is cut in half, it has its highest anti-oxidant quality.  Leave the orange just sitting open and the anti-oxidants leave the orange.

    Put the orange in a sealed container in the refrigerator and the anti-oxidants will last much longer.

    Like an orange, if you can’t drink your UltraStream right away, store it in a sealed, preferable glass or steel container, and if possible, in the refrigerator.

  • Will the benchtop UltraStream fit my kitchen tap/faucet?
    How to measure you aerator

    The standard adaptor kit that is included with the UltraStream will fit most kitchen sinks

    The flow diverter and adaptors are designed to fit taps with male and female threads with a diameter of 21 – 23 mm. Four adaptors are included with every new benchtop UltraStream to connect the flow diverter to different sized taps. If your flow diverter is leaking only a small amount, you can try applying plumber’s tape to the thread of the adaptor ring.

    If none of the provided adaptor rings fit your tap, we have the following solutions:

    • We have some specially sized adaptors. To help us find the right adaptor for you, we need to see a photo with an accurate measurement of your tap or aerator (this is the part that screws off from the end of your kitchen tap).
    • You could install the UltraStream under the sink using our Undersink Kit.
    • Jubilee Fitting (see photo) is a rubber fitting which can go over you faucet and secured to the tap with a metal clamp

    • You could change your kitchen tap.
    • You could use the UltraStream in your bathroom or laundry.
  • Do you have a vegan filter that will filter out fluoride?

    Yes, the UltraStream is vegan, the fluoride reduction media in the UltraStream is not bone char.

  • How exactly is Hydrogen generated by the UltraStream?

    The special magnesium O-Dobi beads react with two water moclues to produces magnesium hydroxide and hydrogen gas.

    Mg + 2H2O  →   Mg(OH)2 + H2

    The Hydrogen gas isn’t very water soluble so it’s a good idea to drink the water quick to get the maximum amount of molecular hydrogen.

    Mg = Magnesium Metal
    H2O = Water
    Mg(OH)2 = Magnesium Hydroxide (often called Milk of Magnesia)
    H2 = molecular hydrogen (Hydrogen Gas)
    H = Atomic Hydrogen (Active Hydrogen)

  • How long is the AlkaWay UltraStream warranty?

    The warranty for the UltraStream is 3 years (Conditions Apply) for parts and labor under normal use. Warranty does NOT cover filters as there are too many variables in the source water.

  • How much UltraStream water should I drink?

    This depends on a number of variables. As a general guide for medium weight people is to drink about 1/3 of your body weight in ounces a day. So if you weigh 150 lbs (68 kgs), you should drink roughly 50 fluid oz (1.47 Liters) of water. If you work out, if it’s hot and you’re sweating more, if you fly, if you have a soda/coffee/tea, then you can choose to drink more. All of those things speed up the elimination of water and therefore, we need more.

  • Will my UltraStream be out of date in a year or so?

    Unlike electric water ionizers, the UltraStream’s filter cartridge actually contains the media that ionizes, alkalizes and infuses the water with molecular hydrogen. So when you change a filter, you get the brand new version, which will incorporate any updated technology we have implemented. That’s why we call it an ‘eternal’ system.

  • Are there any precautions before drinking UltraStream water?

    The only consideration is for those taking pharmaceutical medicine or suffering from kidney disease. We recommend you consult with your doctor.

    UltraStream water may be delivered to the cells more efficiently than tap or bottled, so we recommend not taking any medications with it. We suggest you stop drinking 30 minutes prior to taking the medication and then waiting until at least 30 minutes after.
    We have no evidence of adverse results, but give this advice for legal purposes only.

  • What other contaminants does the UltraStream remove?

    Heavy metals including mercury, lead, aluminium and copper, as well as bacteria, pesticides, algae and fungi. For more details, Review or download laboratory test results.

  • Why is molecular Hydrogen (H2) so important?
    • It is a selective antioxidant
    • It targets and neutralizes the harmful, cytotoxic free radicals, such as hydroxyl radicals.
    • Scientific studies have concluded that Hydrogen may help and prevent a range of diseases including cancer, diabetes, cardiovascular, arthritis, gout, and other inflammatory-related degenerative diseases.
  • What are the major reasons why people love the UltraStream Water Filter?
    • It helps people feel better, perform better and enjoy a healthier life.
    • It is easy to install, operate and replace the filter.
    • It is affordable, benchtop costing 75 cents/gallon for the first year and then down to 31 cents/gallon on your 12 month filter change (benchtop version).
  • How well does the UltraStream improve pH?

    Our independent laboratory tests used a water sample that was a ‘witches brew’ of pesticides, volatile organics, fluoride, chlorine, heavy metals, and minerals. The UltraStream changed an input pH of 7 to an output pH 9 in these tests. We’ve pushed the lab much farther than the normal lab tests by asking for performance statistics beyond the normal lifespan of the filter. Most water filter tests are taken from the first water out of the filter. Most do not test for a possible reduction in performance as the filter is continued in service.

    Review or download the UltraStream Test results

    UltraStream’s pH performance is directly related to the input water. Tap water is the only regulated water in the US and is around pH 7.0 for most homes. The UltraStream performs wonderfully in this environment and will consistently produce water ranging from pH 8.0 – 9.0. Most commonly, the water starts at pH 9.0 at installation, and by the time the filter needs to be replaced, it measures closer to pH 8.0. The bottom line: more acidic input water will have a lower pH, more alkaline input water will have a higher pH but both may be adjusted using the flow control at the bottom of the UltraStream.

    There are a couple of other advantages as well. In hard water with excessive levels of alkaline minerals (like an overabundance of calcium), the UltraStream uses a special patented media that alters the form of the calcium and prevents it from clogging the filter. It also re-infuses input water with healthier levels and proportions of alkaline minerals, as well as ionizing the water.
    We’ve used our two decades of water filter experience to ensure this lasts the life of the filter, so you have excellent purity and performance from start to finish.

    Those who utilize well water should also expect great performance. Very often, well water starts a bit above 7.0 and this can also translate to higher pH outputs from the UltraStream as well. A sediment pre-filter will likely be required for well water.

  • Can I use UltraStream if I have a whole house water softener?

    Yes, unlike electric water ionizers, the UltraStream will also work well with a water softener.

    Softened water isn’t something you want to drink or cook with, so the UltraStream is a great solution for consumption when you need to maintain soft water for appliance life and showering.

  • Can I connect the UltraStream to existing Reverse Osmosis?

    Yes, the UltraStream can be connected in series with a reverse osmosis (RO) system. It will add powerful alkalizing and ionizing abilities to your acidic, mineral-depleting RO water.

    You could also remove the RO system completely and replace it with the UltraStream.

  • Can I adjust the pH of the UltraStream water?

    All of the attributes of UltraStream water can be controlled by flow rate. The faster the water flows through, the less hydrogen potent it is. We recommend a flow rate of around 0.26 GPM for the best performance. You can easily adjust the flow of the UltraStream by adjusting a small tap underneath the base of the UltraStream.  You can then just turn on the kitchen tap and the UltraStream regulates the flow.

  • Can the UltraStream remove Fluoride?

    Yes. Through lengthy research and development, the UltraStream uses the world’s best-activated alumina media, removing 78% of Fluoride throughout the life of the filter. Review or download our lab test results.

    Up to 95% of Fluoride can be removed when the UltraStream is installed with an additional Fluoride Pre-filter.

  • How long will the UltraStream filter last?

    An UltraStream filter will last 12 months – depending, as always, on source water conditions and use. Our 12-month recommendation is based on a family of 4, who use about 2.1 gallons per day (8 glasses / 65 fluid oz each) for drinking and cooking.

    If you use less, your filter may last longer. More – and you’ll need to replace sooner.

    Filter life always depends on the quality of the input water. The more unwanted stuff in the water, the harder the UltraStream has to work. For the vast majority of users, 12 months of protection and performance is no problem.

    When the filter is replaced (a simple 3-minute job) your UltraStream returns to full filtration, pH, hydrogen and antioxidant power.

No questions matching current filter


  • I can’t find the right sized adaptor ring to fit my kitchen tap

    The easiest way to find out the size of the thread in your mixer tap or faucet is to remove the aerator (this is the part that screws off at the end of your tap) and measure the diameter (across the centre) of the thread.

    Take a clear photo with an accurate measurement of your aerator diameter as shown in the picture below, then call us on 1800 268 469 or email the photo to info@alkaway.com.au and we will find the right adaptor for you.

  • How do I install the UltraStream?

    There are 2 ways to install the UltraStream.
    1. Benchtop – For this connection to work, the faucet has to be “normal”. Normal means the tap doesn’t convert to a shower spray, pull out or have a non-standard head. You’ll utilize a diverter valve to control the water flow. When the slider of the diverter valve is pushed one way, it will flow from the tap as normal. When you push it the other way, the water will be sent to the UltraStream.

    Benchtop Installation Video

    2. Undersink – For those who either have an upgraded faucet or who just don’t want the attention-grabbing UltraStream on the counter, we have an undersink kit option that includes a separate dedicated faucet with all the connecting pieces. Installation doesn’t require a plumber, but if you’d feel more comfortable using one, go ahead. We have sourced the specially designed vented faucet from the best water filter engineer in the US, so there’s no need to worry about lead. Please note that we cannot be responsible for the efficacy of your undersink installation.

    Undersink Installation Video

    IMPORTANT: Do not try to install the UltraStream under the sink without our special vented faucet! Voids any warranty.

No questions matching current filter

27 reviews for UltraStream Undersink – Hydrogen Rich Alkaline Water Filter

5 star
4 star
3 star
2 star
1 star
Powered by Customer Reviews plugin
  1. Bruce C. (verified owner)

    We are more than happy with the UltraStream, very easy to fit, beautiful soft water, and with little Fluroride. The small tap and spout looks great and the main body in the cupboard under the sink. Five Stars

    • Ian

      Hey Bruce, so glad to hear from you!

  2. Wayne Ford (verified owner)

  3. John McLean-Hodgson (verified owner)

    Very nice water

  4. John Blanken (verified owner)

  5. BRIAN HANSEN (verified owner)

  6. Paul (verified owner)

  7. Simone C. (verified owner)

  8. Anne H. (verified owner)

    Thanks for your help and answering my many questions. You guys are ace! I can’t wait for my undersink unit to be installed!!

  9. Lisa D. (verified owner)

  10. Michelle Wight (verified owner)

    We have found the filter fabulous, nice to know we are drinking something a lot safer, no bird poo or frog pee 🙂

  11. Jasmine Potts (verified owner)

  12. Neville (verified owner)

    Seemed daunting upfront, but overall simple

  13. Sok Teo (verified owner)

    Recommendation manufacturer to reduce the alkaline PH between 8 to 9 so majority of family member can drink including children and also to ensure that mild PH is obtained to ensure the stomach produce balance acid for digestion. PH tested were 10.

    • Ian

      Sok, increase flow rate. This will reduce pH. And please note: high pH isn’t the same as high alkalinity. The Ultrastream isn’t loading you up with high levels of alkaline minerals. It’s loading you up with high levels of H2.
      Finally, the idea of diluting stomach acid through alkaline water is pretty well debunked by now.

      Thanks to you for your wellmeaning and helpful feedback!

  14. David Larsen (verified owner)

    So far is performing as we had expected/hoped. Easy to set up as well. My only complaint is that the bottle of pH tester leaked (was not properly sealed) and mostly all gone.

    • webmaster (store manager)

      Sorry about that, ill have a new one sent straight away.

  15. Russell T.

    Everything arrived very quickly. Everything required to fit the unit was in the box. We can really tell the difference after switching to the Ultrastream. Even visitors that normally drink filtered rain water comment on how good our drinking water is. What would be really cool is if, after we change the filter media, you would take back the used filter media, firstly to recycle it and secondly to analyse what contaminants it has captured.

  16. Susan

    We moved from a house supplied with filtered rainwater to drink to one which uses the town supply. Our filter needs changed so I spent a long time researching how to get the best out of the town water we would be using. The Ultrastream came up on top of the list and after some emails with the supportive folks at Alkaway, we took the plunge, spent the money and bought both the Ultrastream and the HomeEdge. We installed them when we moved in and did a blind tasting with the water – before and after the filters were installed. The difference was amazing. The kids said that the new water tasted just like rainwater. We quickly discovered that there is no water quite like that we can get at home and we now take it everywhere we can. I cannot point to a particular symptom or change but there is a difference, an improvement in our overall well-being from drinking this water. Thank you Ian and the team for such a fantastic product. It has certainly exceeded all our expectations.

  17. Desiree (verified owner)

    love the taste of the water.

  18. Anonymous (verified owner)

  19. Shelley H. (verified owner)

    Easy to install. It’s great to know I’m putting healthy, alkaline, hydrogen rich water into my body!

  20. Kal Jade (verified owner)

    Great quality product, really easy to install, fast shipping and good communication. A completely hassle free experience, and the water tastes great! I’d highly recommend this product and this seller.

  21. David Francis (verified owner)

    Ordering process was smooth and the item delivered after a hiccup due to wrong delivering address.

  22. Anonymous (verified owner)

  23. Sabine H. (verified owner)

  24. Debbie Casey (verified owner)

    great water

  25. Jodi

    This is my second ultra stream as I recently moved house. I highly recommend it for the most pure tasting and softest water you could wish to drink. My aches dissipated and my skin became clearer following a gap of not using the ultra stream water filter between moves. I love it and highly recommend to everyone.

  26. Alicia Osmond (verified owner)

  27. LARRY ADAMS (verified owner)

Add a review

Your email address will not be published. Required fields are marked *

You may also like…