The LeveLuk SD501DX and SD501U share many of the same core specifications, including 7 electrode plates, a listed negative ORP of approximately -631 mV, and the ability to produce five types of water.

The biggest difference is not the electrolysis system itself, but how the machines are installed and used.

The SD501DX is a countertop Kangen Water machine designed for simple, flexible residential installation, while the SD501U is an under-counter model designed for buyers who specifically want the machine installed beneath the counter.

For most residential buyers, the SD501DX offers a much simpler installation and greater flexibility. The SD501U is a more specialized option for those who specifically want an under-counter configuration and are comfortable with a more involved installation.

*Actual ORP can vary depending on water quality, incoming water conditions, and flow rate.

For most residential buyers, the SD501DX is the more practical choice.

It offers the same 7-plate configuration and the same listed negative ORP as the SD501U, but it can be installed as a countertop machine without the more involved under-counter installation process.

The SD501DX also offers:

• Simple DIY installation
• Non-permanent installation
• Easy relocation
• Universal power input
• Voice guidance in 8 languages
• Greater flexibility for international use

The SD501U is better suited to a specific type of buyer:

Someone who specifically wants the machine installed under the counter and prefers that configuration enough to accept the additional installation requirements.

The SD501U should therefore be viewed as a specialized under-counter option, rather than simply a higher or better version of the SD501DX.

The easiest way to understand these two models is to look at where and how they are installed.

Installation is one of the biggest reasons to choose the SD501DX over the SD501U.

SD501DX: Simple DIY Installation

The SD501DX is designed for straightforward countertop installation.

The machine connects to the appropriate water supply and drain arrangement without requiring the more extensive installation work associated with an under-counter system.

Because it is a countertop machine, the installation is non-permanent, allowing the machine to be disconnected and moved when necessary.

This can be especially useful for:

• Renters
• People who move homes
• People who travel or relocate
• Homeowners who do not want to modify their countertop
• Buyers who prefer a simple installation process

SD501U: Professional Plumbing Installation

The SD501U requires a more involved under-counter installation.

The installation requires:

• Plumbing work
• Drilling
• An appropriate under-counter installation location
• Professional plumber assistance

The customer is responsible for finding and arranging a qualified plumber.

Once installed, relocating the SD501U is not as straightforward as moving a countertop machine because the plumbing connections and drilled installation points need to be addressed.

Yes.

The under-counter configuration requires drilling as part of the installation.

This is an important consideration before purchasing.

If you own your home and specifically want an under-counter installation, drilling may not be an issue.

However, if you rent your home or prefer not to permanently modify your countertop, the SD501DX is generally the more practical option.

The SD501DX avoids this type of permanent modification because the machine is designed for countertop installation.

Yes.

One of the major practical advantages of the SD501DX is its non-permanent countertop installation.

If you move to another home, rearrange your kitchen, or simply want to change the machine's location, the SD501DX is much easier to relocate.

This is particularly useful for renters or anyone who does not expect to remain in the same kitchen permanently.

The SD501U is different.

Because it is installed beneath the counter with plumbing connections and drilling, moving it later requires substantially more work.

This makes the SD501DX the more flexible option for buyers who value portability and future flexibility.

Both models are designed to connect to a household water supply, but the installation approach is different.

The SD501DX uses a countertop configuration that is intended to be relatively straightforward for residential users.

The SD501U integrates into an under-counter setup and therefore requires more extensive plumbing work.

For buyers who want the simplest path from purchase to everyday use, the countertop SD501DX is generally the easier choice.

An important point is that both the SD501DX and SD501U have 7 electrode plates.

Both also have the same listed plate size:

135 × 75 mm

Both models are listed with approximately:

-631 mV negative ORP

This means the SD501U does not offer a higher plate count or a more negative listed ORP simply because it is an under-counter model.

The primary reason to choose the SD501U is therefore the under-counter installation configuration, not a higher electrolysis specification.

Both models are listed at approximately -631 mV negative ORP.

The listed ORP is therefore essentially the same between these two models.

Actual ORP can vary depending on water quality, incoming water conditions, and flow rate.

If your primary reason for choosing a machine is its electrolysis configuration or listed ORP, there is no major advantage to choosing the SD501U over the SD501DX based on these specifications.

The SD501U's main distinction is its under-counter format.

There is another point worth considering when comparing the SD501U with the rest of the Kangen Water lineup.

The SD501U has 7 electrode plates, while the premium countertop LeveLuk K8 has 8 electrode plates.

The SD501U is also positioned at a price level comparable to the K8.

This creates an important value consideration.

If you do not specifically need an under-counter machine, it is worth comparing the SD501U with the K8 before making a decision.

The K8 provides:

• 8 electrode plates
• A more negative listed ORP of approximately -722 mV*
• Premium countertop configuration
• Touchscreen interface
• Universal power input
• Voice guidance in 8 languages
• Non-permanent countertop installation

The SD501U, in comparison, provides:

• 7 electrode plates
• Approximately -631 mV listed negative ORP*
• Under-counter installation
• English language operation
• USA-market voltage configuration

In other words, if you are considering the SD501U purely from a value perspective, the K8 deserves serious consideration.

The SD501U makes the most sense when the under-counter format itself is the reason you are buying it.

If you do not specifically require an under-counter installation, a countertop model may provide greater flexibility and, depending on your priorities, a stronger overall value proposition.

*Actual ORP can vary depending on water quality, incoming water conditions, and flow rate.

*Actual ORP can vary depending on water quality, incoming water conditions, and flow rate.

The SD501DX and SD501U also differ significantly in availability.

SD501DX

The SD501DX features universal power input, making it suitable for use across countries with different standard electrical voltages.

This makes the SD501DX a practical choice for international buyers.

If you live outside the United States, the SD501DX is the more appropriate countertop option to consider.

SD501U

The SD501U is a specialized model with limited market availability.

It is sold in:

• United States
• Japan

It is not sold in other international markets.

The SD501U also uses a market-specific voltage configuration rather than the universal power input found on the SD501DX.

For buyers outside the United States or Japan, the SD501DX or another appropriate countertop model should therefore be considered instead.

The SD501DX provides voice guidance in 8 languages:

• Japanese
• English
• French
• German
• Chinese
• Vietnamese
• Spanish
• Portuguese

The SD501U supports English only.

This makes the SD501DX more versatile for international households and multilingual users.

The difference is particularly useful for buyers who appreciate spoken confirmation when selecting different water settings.

Interestingly, the listed water production rates are the same for both models.

Both models therefore have the same listed production rates.

This reinforces the point that the SD501U is primarily differentiated by its installation format, rather than by higher water production or a different electrode configuration.

The listed dimensions of the two machines are the same:

264 × 338 × 171 mm

Their listed weights are slightly different.

The physical machine itself is therefore not dramatically different in size.

The major difference is where the machine is installed.

With the SD501DX, the machine remains accessible on the countertop.

With the SD501U, the machine is installed beneath the counter, while the water outlet and controls are positioned for under-counter use.

Both models have a listed 5-year warranty.

The SD501DX has a listed power rating of 230 W, and the SD501U is also listed at 230 W.

The major difference in this area is therefore not power or warranty, but the power input configuration.

The SD501DX uses universal power input.

The SD501U uses a market-specific configuration appropriate to the markets where it is sold.

For buyers who want to review the technical specifications side by side:

*ORP values are listed specifications under specified conditions. Actual ORP can vary depending on water quality, incoming water conditions, and flow rate.

For most buyers, the answer is straightforward.

Choose the SD501DX if you want:

• A countertop Kangen Water machine
• Simple DIY installation
• Non-permanent installation
• The ability to move the machine more easily
• No drilling for an under-counter installation
• Universal power input
• International flexibility
• Voice guidance in 8 languages
• 7 electrode plates
• Approximately -631 mV listed negative ORP
• A 5-year warranty

The SD501DX is the more practical choice for the majority of residential buyers.

Choose the SD501U if you specifically want:

• An under-counter configuration
• The machine hidden beneath the countertop
• A permanently installed setup
• A solution designed around a particular kitchen layout

The SD501U is best considered when the under-counter installation itself is important enough to justify the additional installation work and reduced flexibility.

If you do not specifically need an under-counter machine, there is generally little reason to accept the additional installation complexity.

The SD501DX and SD501U share many of the same core specifications.

Both have:

• 7 electrode plates
• Approximately -631 mV listed negative ORP
• The same listed water production rates
• Five types of water
• 230 W power
• 5-year warranty

The major difference is the installation concept.

The SD501DX is a flexible countertop model with simple DIY installation, non-permanent installation, easier relocation, universal power input, and 8-language voice guidance.

The SD501U is a specialized under-counter model that requires a more involved professional plumbing installation, drilling, and a more permanent setup. It is also limited to the U.S. and Japan markets.

There is also an important value consideration: the SD501U has 7 electrode plates at a price level comparable to the premium countertop K8, which has 8 electrode plates and a more negative listed ORP of approximately -722 mV.

Therefore, if you specifically need an under-counter installation, the SD501U may be the appropriate solution.

But if you simply want a high-quality residential Kangen Water machine without the complexity of permanent under-counter installation, the SD501DX is the more practical choice.

And if you are considering the SD501U mainly because of its price or specifications rather than because you specifically need an under-counter machine, it is worth comparing it with the K8 before making your final decision.

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