TOTO EWATER+: Understand The Clean Innovation

One feature you often see in TOTO washlets is EWATER+. It used to be a feature only embedded in high-end models, but you can find it in some mid-range models now.

toto ewater

However, EWATER+ is still a new word to most customers. Therefore, I will show you what EWATER+ is and everything you need to know about it before making a final purchasing decision.

Check the best TOTO washlet we reviewed 


electrolyzed water

EWATER+ is a clean technology of TOTO that uses electrolyzed water as a clean agent to sterilize the toilet bowl and wand. Electrolyzed water is not something new, but TOTO is the first plumbing brand to use it.

Electrolyzed water is an industrial-grade technology that has been around for more than 50 years. It works by turning the components in the tap water into natural disinfectants and sanitizers. This technology has been used a lot in the food industry and hospitals.

The regular tap water contains sodium chloride ions (NaCl), and the water is made up of hydrogen and oxygen (H2O).

When the electrical current is applied to the tap water, these two molecules will break apart and compose two new molecules: hypochlorous acid (HOCl) and Sodium hydroxide (NaOH).

Hypochlorous acid (HOCl) is a mild and non-toxic but powerful clean agent to fight bacteria that you can apply to your skin. It is also something that exists in your body that helps to fight infections and bacteria. 

Sodium hydroxide (NaOH) is a standard detergent often used at home or commercial. 

You can watch this video to have a clear idea.

These two new components are both effective but harmless without any added chemicals.

Don’t worry. The concentration is very low, so it will not in any way hurt you. On top of it, EWATER+ will return to regular tap water after two hours.

In fact, the TOTO washlet doesn’t spray EWATER+ water on your sensitive skin. These bidets only use it on the wand and bowl. 

Benefits of EWATER+

Honestly, the research about bidets is limited. A study in Japan tested 292 electric bidet toilets at a university hospital. The result showed that 86.9% of nozzles are contaminated by one or more organisms.

While the contaminated nozzles don’t indicate that your sensitive area will be affected, it is better to be safe than sorry.

EWATER+ can kill the bacteria. When it is applied to bidet seats, it will be helpful in keeping the nozzle and bowl in a good hygienic condition. 

It is also environment-friendly. EWATER+ itself doesn’t produce any harmful and extra chemicals, and you can use fewer harsh detergents to clean the bowl and bidet.

You should still clean the bidet and toilet from time to time, but you can save some time on cleaning because there are fewer sediments and wastes accumulated in the bowl and nozzle.

How does EWATER+ work in TOTO Washlet?

TOTO washlet will clean the nozzle before and after each use by EWATER+. If the bidet is not used for more than eight hours, it will use EWATER+ to clean the nozzle again. Hence, the nozzle will always be clean and ready for use.

EWATER+ also works to clean the toilet bowl. After each use and when the bidet is not active for a long time,  the Washlet will mist the bowl with EWATER+ so that the bacteria will not continue to grow in the bowl and the waste will not become built-up that is hard to remove.

Note that PREMIST is different from the EWATER+ feature. Premist will mist the bowl when you approach since the wet bowl can clean better than a dry bowl. (TOTO claims it is 80% better.)

However, it doesn’t use EWATER+ water to wet the bowl, and not every model with a PREMIST feature will have EWATER+.

Which TOTO Washlet models use EWATER+ technology?

As I said, high-end TOTO Washlets will use EWATER+, and these models often have an “E”  on their series name. The models include S300E, S350E, S500E, S550E at this moment.

Outside of that, almost all the TOTO NEOREST bidet toilet combos have an EWATER+ feature. Considering the price of these products, they should embrace the most advanced features from TOTO.

Luckily, you can enjoy EWATER+ in some mid-range models now, such as C2 Washlet and C5 Washlet. C2 and C5 are the upgrade version of C100 and C200.

However, the EWATER+ in C2 and C5 is slightly different from high-end models. Mid-range models will only use EWATER+ to clean the wand before and after each use. It will not mist the surface of the toilet bowl with it.

Final Thoughts

EWATER+ is an excellent innovation from TOTO for sanitizing purposes. It turns the elements in tap water into nontoxic disinfectants to eliminate the bacteria and waste in and out of the nozzles and on the bowl surface. This process lies in the magic of electrical current, and you don’t have to add any chemicals.

This technology has been used in other industries for a long time, but TOTO is the first to use it in a bidet seat. It is a great idea!

Nozzles can get contaminated if you don’t clean them often. With EWATER+, it could remove the harmful organisms adhered to it. Even when it is not in use, it will clean it periodically. So your bidet is always good to use.

A bowl surface is also a common place for bacteria growth. The EWATER+ will mist on it to keep the toilet clean.

The Washlets with EWATER+ usually cost a bit more. But it is a valuable feature for you to invest in.

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Kevin Chow is an enthusiast of home improvement. He is an engineer and likes to test all the tech gadgets on the market. He starts to use bidet seats after his journey to Japan and he had tried a few brands.