NEOREST AS Dual Flush Toilet review

? Are you considering an ultra-efficient toilet that combines powerful flushing, an integrated bidet seat, and self-cleaning technologies for a cleaner bathroom experience?

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Quick summary

You’re looking at the NEOREST AS Dual Flush 1.0 or 0.8 GPF Toilet with Integrated Bidet Seat and EWATER+, Cotton White – MS8551CUMFG#01. This is a high-efficiency one-piece toilet by TOTO that pairs a siphon-jet Tornado Flush with an integrated electronic bidet seat and surface treatments designed to keep the bowl cleaner longer. If you value reduced water use, automated convenience features, and advanced hygienic coatings, this model aims to combine all of those into a single fixture.

What this product is

This model is a one-piece toilet with an integrated electric bidet seat and Toto-specific technologies like EWATER+ and CEFIONTECT glaze. It’s offered as a dual-flush option (1.0 or 0.8 gallons per flush), so you can choose higher or lower flush volumes depending on needs. You’ll get automatic lid functions and a suite of bidet spray modes paired with water pressure and temperature controls.

Key features at a glance

Below you’ll find the most relevant features and why they matter for everyday use. These features are focused on water efficiency, hygiene, and user comfort. Read through each item to see how they might affect your experience and maintenance needs.

Feature breakdown table

Feature	What it does	Why it matters for you
Dual Flush (1.0 / 0.8 GPF)	Offers two flush volumes you can select	Conserves water while maintaining effective waste removal
TORNADO FLUSH (siphon jet)	Centrifugal dual-nozzle bowl rinsing system	Improves bowl cleaning and reduces the need for multiple flushes
CEFIONTECT glaze	Ultra-smooth ceramic coating	Minimizes waste and scale from sticking to the bowl, making cleaning easier
Integrated Bidet Seat	Rear cleanse, soft rear, front cleanse, oscillating, pulsating	Replaces separate bidet fixtures and provides personalized cleansing modes
Water pressure & temperature control	Adjustable strength and warmth for sprays	Lets you tailor comfort and hygiene to your preference
Auto open/close lid & auto flush	Lid opens/closes automatically and toilet can auto-flush	Adds convenience and reduces touch points for improved sanitation
EWATER+	Electrically treated water applied to surfaces	Helps sanitize the bowl and bidet nozzle area to reduce buildup
Cotton White finish	Color and finish	Neutral aesthetic that matches many bathrooms and hides minor stains

Flushing performance and water efficiency

You’ll notice the focus on water savings when you look at the dual flush options and Tornado Flush design. The 1.0 and 0.8 GPF settings let you select a stronger flush when needed, or a very low-volume flush for liquids. TOTO’s Tornado Flush uses a powerful siphon-jet flow with dual nozzles that create centrifugal action inside the bowl, which helps remove waste with fewer flushes. For you, that can mean fewer clogs and less water usage over time.

If you’re replacing an older 1.6 GPF toilet, your water use per flush could drop substantially. That reduces your household’s water consumption and can lower utility bills, especially if your household flush frequency is high. The tradeoff to consider is that very low-flush designs sometimes require more strategic placement or stronger initial flush to move larger loads, so pairing the lowered volume with the Tornado Flush design is intended to offset that concern.

How the bidet features work

The integrated bidet seat is the primary comfort and hygiene upgrade in this model. You control rear cleanse, soft rear cleanse, front cleanse (for feminine hygiene), oscillating spray, and pulsating spray. Each of those modes allows adjustment of water pressure and temperature so you can make the spray feel gentler or more vigorous depending on the task.

The bidet nozzles are usually governed by the seat’s control interface (remote or side panel depending on configuration). For you, these modes mean less reliance on toilet paper, increased personal cleanliness, and an experience that can be adjusted to suit sensitive skin or preferences. If you’re new to bidets, start with lower pressure and lukewarm water, then adjust until you find the right balance for comfort and effectiveness.

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EWATER+ and CEFIONTECT explained

EWATER+ is TOTO’s electrolyzed water system that lightly mists the bowl and nozzle surfaces with treated water that has mild antimicrobial properties. The idea is to reduce bacteria and residue buildup between manual cleanings. For you, that translates into less frequent heavy scrubbing and a fresher-feeling bowl.

CEFIONTECT is a long-lasting ceramic glaze that creates an exceptionally smooth surface on the bowl. That smoothness prevents debris and scale from sticking, which reduces staining and makes routine cleaning simpler. Together, these technologies reduce the amount of harsh chemical cleaning you’ll need to do and help maintain a cleaner appearance for longer.

Convenience and automation features

Auto open and close lid and auto flush functions reduce the need to touch the toilet and improve overall sanitation. If you appreciate automation, you’ll like that the lid can lift and close on its own and that the unit can flush without contact. These features add convenience for the whole household and are particularly useful if someone has limited mobility or you want to maintain a touchless bathroom environment.

These automations are also designed to reduce accidental splashes and manage odor by flushing promptly. However, you should be prepared for occasional calibration or sensor adjustments to make sure the system behaves exactly as you prefer.

Installation and power requirements

Installing an integrated bidet-toilet typically involves both plumbing and an electrical connection. You’ll need a nearby water supply line and a grounded electrical outlet to power the bidet seat and EWATER+ functions. Before you buy, check the product’s installation manual or consult with a plumber to confirm your bathroom layout supports the required electrical outlet and water hookup.

If you don’t already have a 120V GFCI-protected outlet close to the toilet location, you may need an electrician to add one. Additionally, check the rough-in measurement in the product documentation so you can ensure the toilet will fit within your existing bathroom footprint. If modifications to the floor or walls are required, factor that into the installation cost and timeline.

Maintenance and cleaning

You’ll find maintenance is easier than for a traditional bowl in some respects, thanks to EWATER+ and CEFIONTECT. EWATER+ helps sanitize the bowl and nozzle area, and CEFIONTECT reduces residue buildup on the ceramic surface. You should still perform routine cleaning with non-abrasive cleaners recommended by TOTO and avoid harsh scouring pads that could damage the glaze.

For the bidet nozzles, follow the manufacturer’s guidance for periodic nozzle self-clean cycles or manual cleaning as needed. Keep water filters (if installed) replaced according to the schedule in the manual. If you live in a hard-water area, consider a water softening step upstream or more frequent descaling to prevent mineral buildup affecting spray performance.

Expected longevity and reliability

If you maintain the unit according to recommended cleaning and service procedures, you can expect the mechanical and glazing components to deliver long service life. The integrated electronics require attention to keep connections dry and secure. For you, that means staying on top of descaling, validating that seals and hoses remain tight, and protecting the electrical connection from moisture exposure.

TOTO has a reputation for building durable fixtures, but any advanced electronic toilet seat introduces more maintenance points than a simple non-electronic toilet. Keep receipts, registrations, and serial numbers handy in case you need to claim warranty service.

Comfort and ergonomics

The integrated bidet seat offers a combination of cleansing modes and adjustable settings that can be tuned to your comfort. You’ll appreciate that the seat and sprays are designed with user ergonomics in mind: the spray positions, water temperature, and pressure are adjustable to fit personal preference. The auto open/close lid adds convenience when entering and exiting, and the auto flush helps ensure the bowl is cleared without extra effort.

If you have mobility limitations, look for any additional features you may need (such as a remote with large, easy-to-press buttons). If the model includes a heated seat (check the specific configuration), that can add another level of comfort—if not, consider whether a heated option is necessary for your climate and comfort needs.

Water usage and potential savings (example calculations)

If water savings matter to you, here’s a practical way to think about it. These are example calculations to illustrate potential savings; your actual numbers will vary.

• If you currently use a 1.6 GPF toilet and you have a household of four, with an average of 5 flushes per person per day, your daily water use for flushing is:
  • 1.6 GPF × 5 flushes × 4 people = 32 gallons/day.
• Switching to 1.0 GPF:
  • 1.0 × 5 × 4 = 20 gallons/day = 12 gallons/day saved.
• Switching to 0.8 GPF:
  • 0.8 × 5 × 4 = 16 gallons/day = 16 gallons/day saved.

Over a year, those daily savings can add up to thousands of gallons. For you, that could mean a noticeable reduction in your water bill and a smaller environmental footprint. Keep in mind that real-world savings depend on household habits, number of users, and the frequency of heavier flushes that might use the higher-volume setting.

Performance in real-world use

In real-world use, the Tornado Flush combined with the dual-nozzle action tends to clear wastes efficiently while keeping the bowl cleaner. The bidet functionality performs well for general personal hygiene and can significantly reduce toilet paper usage. EWATER+ and CEFIONTECT work together to keep the bowl and nozzles more sanitary between cleanings, which you’ll likely notice as reduced staining and odor.

Some users report that ultra-low flush volumes can sometimes require a second flush for very heavy loads, but the 1.0/0.8 options plus Tornado Flush aim to minimize that. If you often have very large waste loads, you might want to favor the higher flush setting when needed.

Comparing this model to alternatives

When comparing this NEOREST AS model to other smart toilets and bidet seats, focus on integrated features versus add-on seats. An integrated unit often provides cleaner aesthetics, seamless functionality, and manufacturer-optimized components (like EWATER+ and CEFIONTECT). If you compare to separate add-on bidet seats, the integrated approach avoids awkward interfaces between seat and bowl and typically has cleaner engineering around water and power connections.

Competitor features to weigh include:

• Water efficiency ratings and how that affects your usage.
• The quality and longevity of the glaze or coatings.
• The completeness of bidet functions and control ergonomics.
• Manufacturer service network and warranty.

For you, this model stands out if you want the convenience of an integrated system designed by one manufacturer rather than mixing components.

Pros

• Excellent water efficiency options (1.0 and 0.8 GPF) to reduce consumption.
• Powerful Tornado Flush design that aims to clear waste effectively with fewer flushes.
• CEFIONTECT glaze and EWATER+ reduce buildup and sanitation needs.
• Multiple bidet modes with adjustable pressure and temperature for personalized comfort.
• Auto open/close lid and auto flush for touchless convenience.

Each of these pros improves cleanliness, convenience, or resource usage, which are common priorities when upgrading a bathroom fixture.

Cons and things to be aware of

• Integrated electronic systems add complexity and can require more maintenance than a basic toilet.
• You’ll likely need a nearby grounded outlet, which may require electrical work if none is present.
• Very low-flush operation may sometimes need a second flush for large waste loads depending on usage patterns.
• Initial cost and installation expense are typically higher than a standard non-electronic toilet.

You should weigh these tradeoffs against the long-term convenience and water savings to decide whether this model fits your needs.

Who should buy this toilet

You should consider this model if you:

• Want to reduce water consumption without sacrificing cleaning performance.
• Prefer an integrated, manufacturer-designed washlet setup rather than an add-on seat.
• Value automated features like auto open/close and auto flush for sanitary convenience.
• Want reduced cleaning frequency thanks to EWATER+ and CEFIONTECT.
• Desire customizable bidet functionality for everyday comfort.

If you need a very basic, low-cost toilet without electronics, this may be more than you need. But if convenience, hygiene, and water savings are priorities, it’s a strong contender.

Who might want a different option

If you:

• Don’t have a nearby electrical outlet and prefer not to do electrical work.
• Prefer a lower initial purchase price and simpler installation.
• Live in a rental where you cannot modify electrical or plumbing.
• Need extremely high flow for commercial or heavy-use public settings.

In those cases, a standard high-efficiency toilet without electronic features or a simpler add-on bidet seat may make more sense.

Buying checklist

Before you purchase, verify these items to reduce surprises:

• Measure the rough-in dimension and overall space to confirm fit.
• Confirm you have or can add a grounded electrical outlet within reach of the toilet.
• Ensure your water supply line is compatible and that you have the appropriate shutoff valve.
• Check whether the model includes a remote control or side panel and where that will be mounted or stored.
• Read the warranty terms and confirm what’s covered for electronics and mechanical parts.

Taking these steps will help the installation go smoothly and ensure the product meets your expectations.

Troubleshooting common issues

If you encounter problems, here are common issues and first steps you can take:

• No power to bidet seat: Confirm the outlet is powered and GFCI hasn’t tripped, check the power cord connection.
• Low water pressure from nozzle: Check supply valve is fully open and inspect for kinks or clogs; if you have hard water, descaling might be needed.
• Auto lid or auto flush not operating: Check user settings and sensor cleanliness; debris or dust on sensors can affect performance.
• Odors or residues: Run a bowl cleaning cycle if available, use recommended non-abrasive cleaners, and ensure EWATER+ cycle is enabled if configurable.

If these steps don’t resolve the issue, consult the manual for model-specific troubleshooting or contact the manufacturer’s service support.

Warranty and service

Check the included warranty documentation for specifics, especially for electronic components versus ceramic parts. For you, it’s important to register the product if the manufacturer recommends it and to retain proof of purchase. If you need service, contact TOTO or your local authorized dealer to arrange warranty repairs or replacement parts.

Warranty coverage can differ by region and retailer, so verify what’s included for the integrated electronic seat and for the bowl itself. Some parts like seals and hoses may be considered wear items and have different coverage terms.

Installation tips and recommended professionals

For the best outcome, consider professional installation unless you have experience with toilet installations and basic electrical work. A plumber can handle the water connections and mounting, while a licensed electrician can ensure a safe, code-compliant outlet installation. For you, professional installation reduces the risk of leaks, improper electrical connections, and fit issues that could compromise performance.

If you decide to DIY, read the provided manuals carefully and turn off water and power before starting. Have the proper tools and a helper available because these units can be heavy and bulky.

Environmental considerations

This model emphasizes water conservation with the 1.0/0.8 GPF options. If you’re focused on reducing your household’s environmental footprint, the low-flow settings combined with effective bowl-clearing technology can help lower water usage. Additionally, reducing toilet paper use through bidet functions decreases paper consumption and the energy and resources involved in producing and transporting it.

Be mindful that the electronics require electricity and eventual recycling at end-of-life. Check local guidelines for disposing of electronic components and large porcelain fixtures to minimize environmental impact.

Frequently asked questions (FAQ)

Q: Will the EWATER+ completely replace manual cleaning?
A: EWATER+ reduces the need for harsh cleaning and helps maintain hygiene, but you’ll still need periodic manual cleaning to handle mineral buildup and deeper stains.

Q: Do I need a special water pressure for the bidet to work?
A: Typical residential water pressure works for most bidet functions, but exceptionally low pressure may affect spray strength. If your pressure is below recommended levels, consider verifying with the manual or a plumber.

Q: Can the flush volume be adjusted after installation?
A: Dual flush models often let you choose between preset volumes. Check the specific installation and user manual for whether those settings can be changed or locked.

Q: Is professional installation required to maintain the warranty?
A: Warranty terms vary—some manufacturers require authorized installation for full warranty coverage. Confirm with the seller or in the warranty paperwork.

Final verdict

If you want a feature-rich, water-efficient toilet that reduces cleaning effort and offers customizable bidet hygiene, the NEOREST AS Dual Flush 1.0 or 0.8 GPF Toilet with Integrated Bidet Seat and EWATER+, Cotton White – MS8551CUMFG#01 is worth serious consideration. You’ll pay more up front and may need professional installation and an outlet nearby, but you’ll gain convenience, comfort, and potential long-term water savings. If those benefits align with your priorities and bathroom setup, this model is a strong, modern choice for an upgraded bathroom experience.

If you want, I can help you compare this model to specific competitor models or create a pre-purchase checklist tailored to your bathroom’s measurements and electrical configuration. Which would you prefer?

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