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Nexus water ionizers made by the largest (and oldest) manufacturer of water ionizers in Korea, Ionia. The Smart water ionizers deliver the highest-quality of ionized water I've ever tested. What makes the Smart series of water ionizers so high in quality is the levels of molecular hydrogen. Nexus Water ionizers are a product of both Japan and Korea. One hundred percent of Nexus water cell (main ionizing part) is made in Japan and the rest is made in Korea. 

Nexus Water Ionizers

Nexus Water Ionizers & Filters

The Nexus brand of water ionizers are really fantastic water ionizers. Every Nexus water ionizer is constructed with the highest quality materials and workmanship from Japan and Korea. The patented water ionizer electrolytic cells are Japanese-made and are the highest quality of electrodes and water-ionizing-systems money can buy. The rest of the Nexus water machine is made in the largest and most professional water ionizer factory in Korea. 

Nexus water ionizers have been developed in cooperation with Dr. Sano Yoshimi, CEO of Sano Technical Research Center of Japan. Dr. Yoshimi has had a major impact on the development, research applications and clinical trials of water ionizers, and is world-renowned in this field. Scroll down to see more about Dr. Sano Yoshimi's influence on Nexus Water Ionizer development below.

Ionia, the Korean factory which makes the Nexus water ionizers, is the largest water ionizer manufacturer in Asia. Ionia is one of the oldest and most well-respected manufacturing facilities in Korea. Ionia has developed over 30 water ionizers over the years and has over 20 patents. It is the first water ionizer manufacturer in Korea to earn the Good Manufacturing Practice certificate. Ionia also earned itself the Industrial Medal of Merit from the Japanese Emperor.


Established Date Royal Water 1970 / Donyang Science 1982 / Jupiter Science 2000 / Ionia 2006
Products Medical equipment, water ionizers, filters, water purifiers
Head Office Ionia: Goyang City (just outside Seoul, South Korea)
Water Ionizer Brands Jupiter, Nexus, Emco Tech, Royal Water and others
Research & Development (Japan) Narita, Japan (20 PhD level scientists and engineers on staff in Japan)
Research & Development (Korea) Bucheon Gyeonggi-do, South Korea (6 PhD scientists and engineers in Korea)
Water Cell Manufacturing Narita, Japan


Hospital Grade Water Ionizers

Nexus water ionizers are hospital-grade water ionizers! Hospitals, researchers, and doctors who have worked with the Nexus Company over the past 30 or so years, have been very supportive of the Nexus brand. Nexus water ionizers are made in the same factory in Korea that makes LG, Samsung and other big name brands of electronics...so I trust the manufacturer. Nexus uses a patented method of spraying their plates to ensure the plate is thoroughly coated with platinum and that no dust or air-bubble gets trapped into the coating. This coating process is crucial to getting good performance and durability in a water ionizer, and this process is used in both the X-Blue and Smart Nexus water ionizer models. The plates have been tested and proven to increase the surface area of platinum and therefore produce the very most efficient ionization & maximum ORP.  See this plate comparison

Hospitals, researchers, and doctors have benefited by collaborating with the Nexus Company over the past decades. Nexus engineers are leaders in the industry and help to bring the healing benefits of NEXUS BRAND alkaline ionized water to new levels of professional use, testing and validation.

Nexus Water Ionizers: Superior Brand of Water Ionizers!

Nexus water ionizers are a superior brand of water ionizers! The Nexus brand water ionizer engineers utilize the best practices in both design and construction-quality, and therefore they produce top-performing water ionizers. 

Huge Savings with Nexus Brand Water Ionizers

Nexus water ionizers are awesome as alkaline water machines and as hydrogen-water machines. Because of our importing rights, we price them relatively low for the high quality you are getting.  Instead of gouging you (or doing illegal, "deceptive pricing" tricks with our prices), we just simply pass our savings onto you when you buy Nexus water ionizers from Alkaline Water Plus. 

Nexus Water Ionizer Certificates

Nexus Lifetime Warranty Information:  

Nexus water ionizers have passed precise inspection by the manufacturer, under strict quality control, and come with a Nexus Lifetime Warranty as described below. It is not expected that you will ever need repairs, but in the event you do you should, save your invoice for proof of your entitlement to repair or upgrade under this warranty. 

Nexus Warranty Overview

Any defect which develops from spontaneous-malfunction, is entitled to warranty service, which means repaired free of charge for both parts and labor. Spontaneous-malfunction means that the problem was not customer-error, source-water damage, or other situation that arose from the customer, shipping company, or environment which resulted in the damage. It just happened, and there is no fault on the customer's part or the environment's part. See more below.

Conditional: If parts are no longer available or your machine is not able to be repaired, you will qualify for upgrade credits (see below). For this or any warranty service, you must have proof of purchase of your Nexus water ionizer from either Alkaline Water Plus or one of it's authorized dealers.

Definition of Customer Error: The warranty is intended to cover spontaneous defects in the product only. While labor is always free, access to free lifetime parts is based on the proper use of the equipment. Customer error means: misuse, drops, rough handling, rough shipping, improper care, improper water source, commercial use, operating for over one month with an internal leak without sending for repair, infestation, collisions, fire, flooding, natural disaster or violating anything listed in the Notes & Cautions section, below.

In the event of customer error, we will still repair your water ionizer and you will only be charged whatever we are charged for parts. 

Note: Any time you'd rather exchange your machine for a new one (any brand we sell) we can arrange that for you (see section on Upgrade Credit, below).

Upgrade Credit: Upgrade credit is a unique feature of the Nexus warranty. You can use this even if your water ionizer isn't damaged. For instance, you may just want to upgrade to a newer model. For this, our plan will work perfectly in your favor. We offer you a new water ionizer of your choice and will credit you a generous percentage of the amount you paid for your Nexus ionizer toward the retail price of the new water ionizer in exchange for your old model. We offer this regardless of whether the machine is damaged or not...even if you caused the damage yourself. The following percentages apply:

    • Less than 2 years old in good condition: 50%
    • Less than 5 years old in fair condition: 30%
    • Over 5 years old: 20%

Notes & Cautions:

  • If you have excess sodium, due to a water “softener”, or iron in your source water, you would need to filter them out as part of the expected proper care. Do not put salt in the mineral port of any Nexus water ionizer. Sodium and iron are both highly electrically conductive and could cause undue damage to your water ionizer over time.
  • Save yourself from accidental user-error and prevent trouble before it happens by knowing how to set up and care for your machine. Here are a couple of pages about that:
  • It is a condition of the Lifetime Warranty that you agree to replace the filter cartridge no less than every twelve (12) months. We have to be able to find your filter purchases in our records. Using any filters other than those listed on this page will void your warranty. We do not accept filters purchased elsewhere.                    
  • Nexus water ionizers will give you a continuous flow of high-quality ionized or filtered water all day long, however they are not intended for commercial use (i.e., more than a gallon of pouring at any one time or more than 15 gallons per day). 
  • If you live in a hard water area, please note that cleaning scale from inside a water ionizer is not offered as a free service, however we will send you instructions of how to do this easily yourself. If you know your water is hard, we suggest you use the EOS (Elimination of Scaling) Device to protect your machine.
  • If your water-flow slows down, it could be caused by calcium build-up. Do not continue to use the water ionizer without doing the proper vinegar wash first. If that doesn't fix it, you should contact us for advice.
  • Under sink installation or any installation that keeps a Nexus water ionizer under constant pressure would be a customer error.
  • The Nexus water cells are made for the absolute best ionization, but under normal and controlled water pressure. Applying excessive water pressure to the Nexus water ionizer would be a customer-error. Set the water coming into the ionizer to be no higher than 2 liters/min. 
  • The best water outflow-rate for any Nexus water ionizer is 1.5 liters per minute.
  • If you operate a Nexus water ionizer regularly with over 2 liters per minute of water coming into it would be a customer error. We suggest to install an external flow-control shut off, which will regulate this automatically for you, if you have trouble with this.
  • Proper care of the water ionizer is necessary and is your responsibility as the consumer. Don't operate the Nexus water ionizer in a barn, garage or other dusty/dirty location or in a location where the temperature isn't regulated to a normal room temperature.
  • If a malfunction occurs, further operation without making the needed repairs could cause more damage. For instance operating the machine with an internal leak could cause electrical shorts, rusting of internal screws and other such damage. While the first damage may be covered by your warranty, the further damage incurred by continuing to use would be a customer error. 
  • Nexus water ionizers aren't intended to be left unused for several months at a time. The best use of a Nexus water ionizer machine is to use it every day. If you are away for more than a couple of weeks, you should try to arrange for some water to be poured through it every week (or at least every month) to keep the water cell from drying out. If the machine is disconnected from a water supply the provided plugs must be kept in placed on every port and the filter (or a blank filter) should be placed in the filter port. This is to ensure the membranes in the water cell don't dry out.
  • Operating any water ionizer with a dried-out water-cell can cause the water cell to burst when you start it up again. If you think your Nexus water ionizer water cell may have dried out, contact us for detailed instructions on how to safely get it up and running again. 
  • Cost of shipping, both ways, is the responsibility of the customer for repairs and for upgrade-credit exchanges.

Note: Do not return your water ionizer for repair without pre-approval or without following our instructions for shipping. You must have our approval, and then follow our packing/shipping instructions precisely, to qualify for warranty service. 

Shipping Costs: You will be shipped a water ionizer that is in good working condition. If your water ionizer arrives damaged, we will replace it without charging you shipping costs. But, you must notify us of the damage within 10 days. After that, all shipping [both ways] for warranty fulfillment is the responsibility of the purchaser. Notes: We reserve the option to repair or replace unit [with same or comparable unit].

Transfer of Ownership: You may transfer ownership, but you will need to contact Alkaline Water Plus in order to do so. This warranty is backed by both the manufacturer of Nexus water ionizers and by Alkaline Water Plus, and we need to make sure all of our paperwork is in order prior to any warranty transfers. There is a $50.00 fee for warranty transfers.


Whether it is a return or repair the way you ship anything to Alkaline Water Plus is very important. Improper shipping has been known to cause damage to equipment in almost all cases. Therefore, 1) make sure to wait for our RMA (Return Materials Authorization) email before you ship (it will give you the proper way to safely ship), and 2) follow our instructions for safe shipping. The consequences of improper shipping are severe, and it would be considered a customer error.

Warranty Service Built on Trust

Alkaline Water Plus has an A+ rating with the Better Business Bureau and has been a member since 2010. This tells you a lot about our business practices at Alkaline Water Plus. We are here to help our customers and you can trust that we will.