Have you been thinking about upgrading your bathroom to a high-end, integrated bidet-toilet solution like the TOTO® WASHLET®+ Aquia IV Two-Piece Elongated Dual Flush 1.28 and 0.9 GPF Toilet and Contemporary WASHLET S7A Contemporary Bidet Seat, Cotton White – MW4464736CEMGN#01?
Buy TOTO WASHLET+ Aquia IV On Amazon
Product overview
You’ll find this model pairs a modern two-piece elongated toilet with a feature-rich WASHLET S7A bidet seat to give you a fully integrated experience. The combination is designed to hide the water supply and power cord for the WASHLET+ seat, which makes the overall look cleaner and more seamless in contemporary bathrooms.
What’s included in the package
When you unbox this set, you get the Aquia IV two-piece elongated toilet and the Contemporary WASHLET S7A bidet seat, plus most of the mounting hardware and the illuminated touch-button remote. You’ll still want to check the box carefully for any additional installation pieces, user manuals, and warranty paperwork so you know where everything is and what steps to follow during setup.
Key specifications at a glance
This quick table breaks down the core specs so you can scan what matters most before going deeper into the review. You’ll see flush volumes, seat features, and sizing details all in one place.
| Feature | Specification |
|---|---|
| Full product name | TOTO® WASHLET®+ Aquia IV Two-Piece Elongated Dual Flush 1.28 and 0.9 GPF Toilet and Contemporary WASHLET S7A Contemporary Bidet Seat, Cotton White – MW4464736CEMGN#01 |
| Bowl shape | Elongated |
| Flush options | Dual flush: 1.28 GPF (full) / 0.9 GPF (partial) |
| Bidet model | WASHLET S7A (Contemporary) |
| Seat features | Front and rear warm water wash, oscillating/pulsing, heated seat, warm air dryer, EWATER+, auto open/close lid |
| Water heating | Tankless instantaneous heating |
| Controls | Illuminated touch-button remote with 4-user memory |
| Deodorizer | Automatic air deodorizer |
| Color/finish | Cotton White |
| Additional features | Nightlight, EWATER+ misting, concealed supply/power |
| Model number | MW4464736CEMGN#01 |
TOTO® WASHLET®+ Aquia IV Two-Piece Elongated Dual Flush 1.28 and 0.9 GPF Toilet and Contemporary WASHLET S7A Contemporary Bidet Seat, Cotton White - MW4464736CEMGN#01
Design and build quality
You’ll notice right away that the Aquia IV toilet and WASHLET S7A seat aim for a modern, minimalist look that fits contemporary bathroom aesthetics. The lines are clean and the concealed connections help the unit avoid the cluttered appearance you sometimes get with aftermarket bidet seats.
Toilet styling and profile
The Aquia IV’s elongated bowl gives you added comfort compared with round designs, and the tank and base have been sculpted to minimize visual bulk. You’ll find the overall silhouette suits modern vanities and fixtures, and the Cotton White finish tends to pair well with neutral or bright tile and decor choices.
WASHLET S7A seat styling
The Contemporary WASHLET S7A seat looks sleek and low-profile while still offering full functionality. The illuminated touch-button remote adds a premium feel and helps you control settings without fumbling in the dark. You’ll appreciate how the seat integrates with the toilet top so it looks like a single, cohesive unit.
Materials and construction quality
TOTO typically uses ceramic for the bowl and high-quality polymers for the seat and trim, and you’ll feel that solid build when you interact with the product. The seat hinges, remote, and electrical connectors are engineered for daily use, but you should still treat them with care and follow the maintenance guidance to avoid premature wear.
Installation
You can install the toilet and WASHLET+ seat yourself if you’re comfortable with basic plumbing and electrical tasks, but you may prefer a pro for clean electrical hookup and to ensure leak-free sealing. You’ll need access to a nearby GFCI-protected outlet and a standard water supply.
Tools and skills required
You’ll need basic plumbing tools—adjustable wrench, screwdriver, level, and possibly a drill if new anchors are required. For the electrical side, confirm you have a GFCI outlet within reach or plan to hire an electrician to add one. If you’re not confident with either plumbing or electrical work, hiring a pro will save time and reduce the risk of mistakes.
Step-by-step summary
The installation generally has three parts: set the toilet bowl and tank, install and connect the WASHLET+ seat (including concealed supply and power), and program the remote. You’ll bolt the toilet to the floor flange, connect the water supply, mount the bidet seat to the bowl, and route the concealed lines into the tank or chase per the included instructions for a neat finish.
Electrical and plumbing considerations
Because the WASHLET S7A requires power, you’ll either need a nearby GFCI outlet or run a dedicated line. The TOTO WASHLET+ system is designed to conceal the supply and power cord for a cleaner look, but you’ll need to make sure the water and electrical lines are accessible and safely installed to code.
Features and performance
This product blends several advanced features: multiple wash modes, EWATER+ sanitization, a heated seat and dryer, automatic lid operation, and memory settings. You’ll find these features intended to add comfort, convenience, and hygiene to everyday use.
Cleansing performance
You get front and rear warm water washing with five adjustable temperature and pressure settings, which let you tailor the wash to your comfort level. The oscillating and pulsing stream options improve coverage and rinsing performance, making the cleansing effective without requiring excessive pressure.
EWATER+ sanitization
EWATER+ is a built-in feature that mists the wand and the toilet bowl with electrolyzed water, which helps keep the surfaces cleaner and reduces your reliance on harsh cleaning chemicals. You’ll likely notice fewer stubborn deposits over time, though periodic manual cleaning will still be necessary.
Heated seat, auto lid, deodorizer, and nightlight
The heated seat has multiple temperature settings so you can avoid cold shocks in the winter, and the auto open/close lid adds a tidy, hands-free touch. The automatic air deodorizer helps reduce odors between uses, and the nightlight makes nighttime bathroom trips easier without harsh overhead lighting.
Warm air dryer and tankless water heating
The warm air dryer has five temperature settings, giving you a comfortable drying option after cleansing. Because the unit uses tankless, instantaneous water heating, you’ll have continuous warm water—no running out mid-cycle. You’ll appreciate this if you have frequent or lengthy washing cycles.
Remote control and memory settings
The illuminated touch-button remote is intuitive and stores up to four user profiles, so each person in your household can save preferred wash, seat, and dryer settings. You’ll find it especially convenient if multiple people share the bathroom and prefer different temperatures or pressure strengths.
Water efficiency and environmental impact
TOTO designed this system to balance cleaning power with water savings. You’ll get the option of a full or partial flush to manage water use, and the EWATER+ feature reduces the need for chemical cleaners.
Dual-flush performance
With a dual-flush option of 1.28 GPF for a full flush and 0.9 GPF for a partial flush, you’ll use significantly less water than many older toilets. If you’re replacing a 3.5–7 GPF model, you should see a dramatic drop in household water consumption and lower utility bills over time.
Reduced chemical usage thanks to EWATER+
EWATER+ mists the wand and bowl with electrolyzed water to help prevent buildup and maintain a cleaner surface. You’ll still need to clean the toilet periodically, but you’ll likely use fewer harsh chemical cleaners, which is better for the environment and gentler on surfaces.
Comfort and user experience
The elongated bowl, heated seat, and customizable wash settings are aimed at providing a comfortable, personalized bathroom routine. You’ll notice the difference in small daily comforts that add up over time.
Seat comfort and bowl shape
The elongated bowl gives you more sitting surface and an overall more comfortable posture than round bowls. The seat itself is contoured and heated, and you can adjust temperature and firmness to match your preference, which makes daily use more pleasant.
Noise and privacy considerations
Automatic lid movement and the dryer produce some mechanical noise, but it’s usually unobtrusive. You’ll want to consider the dryer and pump noise if your bathroom is adjacent to sleeping areas, although most users find the sound level acceptable compared to the convenience offered.
Accessibility features and controls
The remote with memory settings makes it easy to switch between user preferences without complicated menus. You’ll also find the comfort height of the toilet improves accessibility for taller users or those with mobility concerns, reducing strain when sitting and standing.
Cleaning and maintenance
Like any advanced toilet system, the WASHLET+ and Aquia IV require some maintenance to keep everything working well. You’ll want to follow TOTO’s recommendations for cleaning frequency and approved products.
Daily and weekly cleaning tips
Wipe the exterior, remote, and seat with a soft cloth and a mild, non-abrasive cleaner. You’ll want to avoid harsh chemicals on the seat and control surfaces. For the bowl, use toilet cleaners recommended by TOTO and avoid bleach or abrasive tools that could damage glazes or sensors.
Preventing mineral buildup
If you live in a hard-water area, mineral deposits can affect nozzles and surfaces over time. You’ll want to run EWATER+ regularly, and periodically inspect and gently clean the wand. Use descaling products compatible with TOTO guidance, and consult the manual for recommended intervals.
Replacing filters, nozzles, and parts
Some parts, like filters or specific nozzle components, may eventually need replacement depending on usage and water quality. You’ll benefit from registering the product or keeping the manual handy so you can quickly order OEM parts and follow step-by-step replacement instructions.
Pros and cons
You’ll want to weigh the strengths and trade-offs so you can decide whether this system fits your needs and budget. Below are clear pros and cons to help with that decision.
Pros
- Exceptional hygiene features like EWATER+ and warm water washing that improve everyday cleanliness. You’ll find improved comfort and reduced dependency on toilet paper.
- Continuous warm water thanks to tankless heating, so you’ll never run out mid-wash.
- Dual flush with 1.28 and 0.9 GPF saves water and reduces long-term utility costs.
- Four-user memory with an illuminated remote makes personalized settings effortless for multiple users.
- Integrated, concealed supply and power lines create a neat, high-end appearance in your bathroom.
Cons
- Higher upfront cost compared to basic toilets or add-on bidet seats, so you’ll need to be ready for the investment. You may need to balance budget and long-term savings.
- Installation can be more complex than a standard toilet; you might need an electrician for a GFCI outlet or a plumber for a clean install.
- Advanced electronics require careful maintenance; repairs can be more expensive than for simple fixtures. You’ll want to follow maintenance guidelines to avoid problems.
Comparison with alternatives
If you’re comparing high-end bidet-integrated toilets, you’ll find TOTO is often a leader in reliability and innovation, but there are other options that might cater to different priorities.
TOTO vs other high-end brands
TOTO generally stands out for water-saving flush technologies, reliable EWATER+ sanitization, and intuitive user controls. You’ll see competitors offering similar features, but TOTO’s design integration and proven track record are major selling points. If you prioritize reputation and integrated features, TOTO is a safe bet.
Value for money
You’ll pay more upfront, but the combination of water savings, reduced cleaning product use, and daily comfort can offset that over time. Consider how long you plan to keep the upgrade; the longer you expect to use it, the better the long-term value becomes.
Who should buy this product?
This product fits people who want a premium, integrated bidet and toilet experience without sacrificing aesthetics or water efficiency. If you value comfort and cleanliness with modern conveniences, this set is built with you in mind.
Ideal users
- You and your family if you want to reduce paper use and improve personal hygiene.
- Homeowners renovating or building a contemporary bathroom who desire concealed connections and a polished look.
- People who appreciate programmable settings and memory profiles for multiple users.
Who may want to consider alternatives
If you’re on a tight budget or prefer extremely simple, low-maintenance fixtures, you may want a basic toilet or a less feature-heavy bidet seat. Also, if you lack a nearby outlet and don’t want electrical work, a non-powered bidet attachment might suit you better.
Frequently asked questions (FAQs)
Below are common questions you’ll likely have if you’re considering this model, answered in practical, user-focused terms.
Will I need an electrician to install the WASHLET S7A?
You’ll need a GFCI-protected outlet for the seat. If one isn’t already nearby, hiring an electrician is recommended to ensure safe and code-compliant installation. This ensures you have safe power without running questionable extension cords.
How noisy is the dryer and the auto-open/close lid?
You’ll hear a modest mechanical sound from the dryer and lid, but most users find it unobtrusive. If you’re sensitive to noise or have a bedroom adjacent to the bathroom, consider timing usage or checking sound levels in person if possible.
Does EWATER+ replace regular cleaning?
EWATER+ reduces the need for harsh cleaners by misting the wand and bowl, but it doesn’t completely replace occasional manual cleaning. You’ll still want to clean periodically to handle mineral buildup and external surfaces.
How long does the heated seat and warm water last?
Because the system uses a tankless heater, you’ll have continuous warm water for washes as long as the unit is powered and water is available. The heated seat runs continuously when enabled, but you can turn it off or set timers if you want to conserve energy.
Can I use the remote with the lights off?
Yes, the illuminated remote is designed to be readable in low light so you can adjust settings during nighttime trips. You’ll be able to find and use the main controls without turning on bright bathroom lights.
What maintenance should I expect over time?
Expect occasional cleaning of nozzles and surfaces, possible replacement of small wear parts, and periodic descale if you have hard water. You’ll find the maintenance to be similar to other advanced bidet seats, and following TOTO’s instructions will prolong the unit’s life.
Troubleshooting quick tips
If something isn’t working the way you expect, you’ll want to check power, water supply, and remote batteries first. Many common issues are related to loose connections or settings that can be corrected quickly.
- If the seat won’t power on: confirm the GFCI outlet is on and the plug is secure.
- If the spray is weak: verify water supply valves are fully open and check for nozzle restrictions from mineral buildup.
- If the auto-lid doesn’t function: check remote settings and battery levels, and ensure no obstruction prevents the lid’s movement.
You’ll find many problems are minor and resolved by simple checks, but when in doubt, consult TOTO support or a licensed technician.
Cost considerations and warranties
You’ll pay more upfront for a premium integrated system, but check warranty coverage and the expected service life. TOTO offers warranties on ceramics and electronics, but reading the specific terms for MW4464736CEMGN#01 will clarify what’s covered and for how long.
Long-term cost perspective
Water savings from the 1.28/0.9 GPF flushes and reduced chemical use from EWATER+ can lead to lower recurring costs. You’ll also want to budget for potential parts replacement over many years, but the total cost of ownership often balances out for regular users who value comfort and hygiene.
Warranty and support
Always register your product and keep receipts in case you need service. You’ll want to review TOTO’s warranty specifics for the WASHLET seat electronics and the ceramic toilet components to understand coverage timelines and authorized service requirements.
Final verdict
If you want a feature-rich, modern bidet-toilet pairing that emphasizes comfort, hygiene, and water efficiency, the TOTO® WASHLET®+ Aquia IV Two-Piece Elongated Dual Flush 1.28 and 0.9 GPF Toilet and Contemporary WASHLET S7A Contemporary Bidet Seat, Cotton White – MW4464736CEMGN#01 is a compelling option. You’ll enjoy heated seating, customizable washing and drying, EWATER+ sanitization, and a concealed installation that elevates your bathroom’s look.
You’ll need to be comfortable with the initial investment and the slightly more complex installation compared with a conventional toilet, but if those trade-offs fit your priorities, this set delivers a high-quality daily experience. Overall, it’s a strong choice for anyone upgrading to a modern, efficient, and comfortable bathroom solution.
Purchase The Aquia IV Toilet & S7A Bidet On Amazon
Disclosure: As an Amazon Associate, I earn from qualifying purchases.