Water Ionizer Comparison - Compare Under Counter Water Ionizers

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Below are the Top 5 Under Counter Ionizers compared side-by-side for your convenience.

Top 4 Under Counter Ionizers compared Jupiter Delphi™

Jupiter Delphi™

Top 4 Under Counter Ionizers compared LIFE™ M-9U

Life Ionizers MXL-9 UC

Top 4 Under Counter Ionizers compared AlkaPrime S-9U

AlkaPrime S-9U

Top 4 Under Counter Ionizers compared Enagic® SD501

Enagic® SD501

Top 4 Under Counter Ionizers compared Alka Fresh

Alka Fresh

Rating 1-10

Five Plates old technology.
Low power.

Tested the highest of
all models.

View product here.

Good model but warranty
is limited.

View product here.

Older technologies &
over-priced. Medium power & large plates.

Good entry level unit.

View product here.

Titanium/Platinum Plate Specifications

The more plates and the larger the size, the better water will be produced.
This must be coupled with a high power supply.

Number of Plates
GRID or Flat Plate Options
Flat or GRID option
Flat or GRID option
No GRID option
No GRID option
Size of plate surface

Type of Power System

Some machines use the old-fashioned transformer. Look for an ionizer that uses an SMPS power
system for longer life, better warranty and the maximum optimization of your water.

Power Supply
XL Power™ SMPS
(Switch Mode Power System)
SMPS (Switch Mode
Power System)
SMPS (Switch Mode
Power System)
150 Watts
500 Watts
229 Watts
230 Watts
249 Watts

Interior and Pre-filtration

The more filters, the purer the water going into your machine. Ionizers with 2 interior filters and custom pre-filtration systems are the best.

Filtration System
2 Internal, 9 stages
2 Internal, 9 stages,
with free pre-filter system
2 Internal, 9 stages,
with free pre-filter
1 internal, 3 stages
with no pre-filter
2 with pre-filter
Vitamin C Ceramic Block® Filtration Chlorine/ Chloramine Reduction

Yes, standard feature

Warranty and Service

The length of time a distributor has been established is important when it comes to the warranty so that they will be around to service your ionizer. Look for a lifetime parts warranty and a good labor warranty. Many of these companies cover parts but hit you with big labor bills. Optimally a lifetime parts and labor warranty makes it a great system.

Limited warranty covers
all ionizer parts (not accessories) and labor costs in the first 5 years. Also requires a 20% restock fee and 14 days to return unit.
Lifetime warranty on parts & labor
Limited Lifetime warranty on parts plus 10 years labor
5 Years parts & labor
7 Years parts & labor
Trial Period
14 days - 20% restocking fee
60 days - 15% fee
60 days - 15% fee
7-30 days - $800 fee
60 days - 15% fee

Alkaline/pH and Antioxidant Potential/ORP Specifications

The best health results come from the water that is the most optimized. So look for a high negative ORP (antioxidant potential) and a high alkaline mineral level (pH). The best system produces high – ORP at a drinkable pH level.

pH Levels
4.2 - 10.3
2.0 to 11.5 without chemicals
4.0 – 11.0
4.5 - 11*
4.0 – 10.5
Hard Water Adjustment

No adjustments possible

Yes, programmable

Yes, programmable

Yes, programmable

Yes, programmable
ORP Ratings

Optional Features

The more advanced companies offer useful upgrades.

UV Light Disinfection

Yes, optional

Energy Technologies (EFT & Laser)


Distributor Information

It is best to deal with a more established dealer who sells Korean or Japanese ionizers. The longer they are established the more probable are they to be there to service your system and provide support.

How Long Distributor in U.S.?
Since 2007
Since 1996
Since 2012
Since 2004
Since 2011
Country of origin design/ manufacture

Note: all specifications and information has been resourced from manufacturer’s websites
and other marketing materials. If any inconsistencies are noticed, please contact us.

*Wider pH range is available with use of chemicals

Ionizer Features Explained

Number of Plates

Total numbers of plates in the ionization chamber, GRID plates are more efficient than ordinary plates. Look at the thickness of the Platinum on the Titanium plates as this determines the life of the plates.

Power Supply

SMPS (Switched Mode Power Supply): An energy saving feature that allows higher power levels; cooler running; lighter weight; and ensures the ionizer lasts longer. Transformers are generally considered to be obsolete as they run hotter and do not last as long. They are also heavier.


Multiple filters with multiple stages allow for more efficient filtration. Custom pre-filters are an added plus as they extend the life of the internal filters. It is best to filter the water of some toxins before it even reaches the internal filters. There are some companies that review the Federal Water Report for your source water and provide custom pre-filtration – this is a benefit to you.

Trial Period*

This is the amount of time an ionizer company will let you try out the machine. All water ionizers are subject to a return fee during the trial period.

pH Level*

pH is a measure of the potential hydrogen in the water. It compares the amount of hydrogen available to the amount of oxygen available. If there's more hydrogen than oxygen, you get an alkaline pH.

Hard Water Adjustment

Hard water can affect the quality of the water an ionizer produces. Adjustment allows you to get the best performance possible. Custom pre-filters can help address this as it can be a big problem for ionizers.

ORP Levels

ORP (Oxidation Reduction Potential) measures the antioxidant potential of alkaline water. ORP performance is dependent number & size of plates; power and type of power supply to plates; plate design (flat or GRID) and on the tap water quality

UV Light Disinfection

Designed to inactivate bacteria and cysts in the water, makes water safer.

Vitamin C Ceramic Block® Filtration

Vitamin C Ceramic Block is a filtration technology that uses vitamin C in a ceramic matrix. This is the only filtration technology that is effective against chlorine and chloramines

Energy Frequency Technology

EFT harnesses the power of Quantum Biology to energize water with 205 healthful energy frequencies.

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