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TOTO WASHLET Aquia IV Review: Honest Pros & Cons Worth Buying
I spent three years trying to pretend a standard toilet was fine. That ended the morning I realized I was using wet wipes to compensate for what a dry toilet paper roll couldn’t handle. The clog risk. The landfill guilt. The fact that I was doing more work, not less, every single day. So I started looking at bidet toilet combos the way I should have years ago. The TOTO WASHLET Aquia IV review, TOTO WASHLET Aquia IV review and rating, is TOTO WASHLET Aquia IV worth buying, TOTO WASHLET Aquia IV review pros cons, TOTO WASHLET Aquia IV review honest opinion, TOTO WASHLET Aquia IV review verdict that follows is what happened after I ordered one, installed it, and lived with it for six weeks.
Disclosure: Some links in this article are affiliate links. We may earn a commission if you buy through them. This does not influence our findings or recommendations.
If you are in a hurry to see the price, check the current price of the TOTO WASHLET Aquia IV here. But I recommend reading through the full experience first — there are things that do not show up in the product page.
The short answer on TOTO WASHLET Aquia IV
| Tested for | Six weeks of daily use in a two-person household with two different plumbing rough-in configurations |
| Best suited to | Homeowners who want a single integrated unit that hides wiring and hoses, and who are willing to pay for quiet operation and a heated seat with reliable warm water |
| Not suited to | Budget-conscious buyers or anyone with a bathroom where the toilet is very close to a wall on the side (you need clearance for the arm control panel) |
| Price at review | 1309USD |
| Would I buy it again | Yes — but only if I had the budget and the space. It delivers exactly what it promises, and after six weeks I have not found a cheaper option that gives me the same quiet flush and consistent bidet experience. |
Full reasoning below. Or check the current price here if you have already decided.
What This Thing Is and Is Not
This is a two-piece toilet combined with a bidet seat, sold as a matching set. The WASHLET seat is not an aftermarket add-on — it is designed specifically to fit this bowl and tank, and the power cord and water supply hose route through the back of the toilet so they stay hidden. The bowl has a skirted design, meaning the trapway is enclosed, which makes cleaning easier. The flush uses TOTO’s Tornado Flush system — a 360-degree rinse from two nozzles. It is a dual flush: 0.9 gallons per flush (liquid) or 1.28 GPF (solid).
It is not a one-piece toilet. The tank and bowl are separate, which some people find harder to clean the seam. It is not a standalone bidet seat you can attach to any toilet — the hider feature only works with this bowl. It is not cheap. At 1309USD, it sits squarely in the premium tier of the toilet-plus-bidet category. TOTO is the brand that dominates commercial and high-end residential bidets worldwide, so the engineering pedigree is real. You can read more about the TOTO brand history and reputation if you want to dig into why that matters. But at this price, reputation is only one factor — performance is the other.
If you are looking for a budget solution, this is not it. If you want the cleanest possible install and do not want to see wires, this is exactly what it promises.
What You Get When It Arrives
The box is large — roughly 30 inches tall, 30 inches deep, 20 inches wide — and heavy. The unit weighs 83 pounds. Inside, you get the bowl, the tank, the WASHLET S2 seat, the arm control panel (attached to a mounting plate), a soft-touch fill valve hose, and a small EZ-Anchor mounting kit. The instruction manual is clear but dense, covering both toilet and seat installation in about 50 pages. TOTO does not include a wax ring, mounting bolts, or a supply line. That is standard for most toilets, but disappointing at this price point.
Packaging is robust: thick cardboard, dense foam inserts, no visible damage on my unit. The bowl and tank have a smooth, glossy ceramic finish — Cotton White, which is a warmish white rather than a stark hospital white. Plastic components on the seat feel solid, not cheap. The arm control panel has a slightly rubbery texture that resists fingerprints.
First impression: this thing is built to last, but you will be making an extra trip to the hardware store before you can install it.
Getting Started: What the First Week Was Actually Like
The Setup
I have installed a few toilets before, so I assumed it would take an hour. It took two and a half. The bowl mounts to the floor via the EZ-Anchor system: plastic brackets that screw into the floor flange, then the bowl slides into them. It is easier than traditional bolts, but the brackets are plastic and you need to be careful not to overtighten. The WASHLET seat snaps onto the bowl with a slide-in mechanism, but routing the power cord through the concealed channel in the back of the toilet requires patience. The instructions say to route before setting the bowl, which I did not do, so I had to partially disconnect and start over. Documentation quality is acceptable — the diagrams are small but accurate.
The Learning Curve
The seat has a control panel on the right arm. Five buttons: front clean, rear clean, stop, and two arrow buttons to adjust settings (pressure, temperature, nozzle position). There is also a warm air dryer button. The first few days I accidentally hit the front clean button when I meant to adjust pressure. The night light is a soft blue glow that turns on automatically in low light — it is helpful but takes getting used to. The heated seat has three temperature levels; the highest is genuinely warm. Coming from a cold plastic seat, this felt luxurious from day one.
The First Result
My first real use was with the default settings: medium pressure, medium water temperature. The rear clean spray started after a one-second delay, then water hit exactly where it should. It was not a shocking jet — it was a consistent, warm stream that felt natural within about three seconds. The oscillating feature moves the nozzle slightly front to back, which I found more effective than a fixed spray. The dryer works but takes about 45 seconds to achieve a fully dry feeling — I still used a small piece of toilet paper to finish. Overall, the first use was better than I expected, mostly because the water temperature was genuinely warm from the start (the unit has a tankless heater, so no waiting).
After Extended Use: What Changed
What Got Better With Time
The noise level. At first I thought the flush was loud, but after two weeks I realized my previous toilet was just whisper-quiet. The TOTO Tornado flush sounds like a strong whirlpool — it is not silent, but it is not annoying. The seat buttons became second nature; I no longer accidentally hit the wrong one. I also learned that the low-pressure setting (level 1) is barely noticeable, and level 3 is my sweet spot. The water temperature at medium is perfect year-round. I dialed the seat heat to level 2 and stopped touching it.
What Stayed Consistently Good
The cleaning performance. The PREMIST function sprays water on the bowl before each use, so waste rarely sticks. The CEFIONTECT glaze — a proprietary ceramic coating — actually works. I have cleaned the bowl once in six weeks, and that was only because I wanted to test whether it needed it. It did not. The Tornado flush clears everything in one go with the 1.28 GPF option. The dual flush lever is intuitive: up for liquid (0.9 GPF), down for solid (1.28 GPF). The water seal is never left dirty.
What I Wished I Had Known Earlier
First: you need a GFCI outlet near the toilet. The power cord is about 4 feet long, and if your outlet is farther away, you will need an extension — but TOTO warns against using one, and I would not risk it. Second: the arm control panel adds about 3 inches to the width on the right side. My toilet is between a wall and a vanity, and I had to shift the toilet slightly left to keep the arm from hitting the wall. Third: the EWATER+ self-cleaning system runs a small amount of water through the wand before and after each use. That sound is normal, but I thought something was leaking for the first week.
Any Degradation or Concerns Over Time
None so far. The seat hinges feel as tight as day one. The plastic on the control arm has not yellowed. The water heater still delivers consistent warm water. The only thing I noticed is that the night light stays on for about two minutes after you get up, which is fine but uses a tiny amount of power. If anything, the seat has become slightly noisier when the solenoid engages — it is a soft click that I did not notice initially. It is still within normal range.
The Features That Actually Matter
Features That Delivered
- Tornado Flush: Uses two nozzles to create a 360-degree rinse. In practice, the bowl is completely cleaned with no streaking after a solid flush. I tested with a handful of toilet paper and it cleared in one go.
- EWATER+ Self-Cleaning Wand: Before and after each use, the wand is rinsed with electrolyzed water. After six weeks, the wand looks brand new. No residue, no mildew smell.
- Heated SoftClose Seat: Three heat levels. Level 3 is noticeably warm — almost too warm if the room is already hot. The soft-close hinge is silent; no slamming.
- PREMIST: Sprays the bowl before use. Makes a real difference in keeping the glaze clean. Without it, I would be cleaning more often.
- Adjustable Water Pressure and Temperature: Five pressure levels, three temperature settings. The highest pressure (level 5) is strong enough for a thorough clean but not painful. Temperature at the highest is comfortably hot.
Features That Were Overstated
- Oscillating Stream: The marketing makes it sound like a massage. In practice, the nozzle moves about half an inch back and forth. It helps with coverage, but the effect is subtle.
- Warm Air Dryer: Works, but takes 45–60 seconds to dry completely. I found it easier to pat dry with a square of TP. The dryer is not powerful enough to replace paper entirely.
- Automatic Air Deodorizer: Activates when you sit down. It uses a fan that pulls air through a charcoal filter. It reduces odor but does not eliminate it. After two weeks I turned it off because the fan noise was more noticeable than any smell.
Specifications Reference
| Specification | Value |
|---|---|
| Product Dimensions (D x W x H) | 27.56″ x 18.56″ x 30.75″ |
| Weight | 83 lbs |
| Material | Ceramic (bowl/tank), Plastic (seat) |
| Flush Type | Dual Flush (0.9/1.28 GPF) |
| Rough-in | 12″ standard (adaptable to 10″ or 14″ with separate adapter) |
| Electric Requirements | GFCI outlet, 120V, 60Hz |
| Included Components | Bowl, Tank, WASHLET S2 Seat, Mounting Kit, Hoses |
| Color | Cotton White |
For a more detailed look at how this compares to other bidet toilet combos, see our Horow T38P review — a lower-priced alternative.
The Honest Scorecard
| What We Evaluated | Score | One-Line Note |
|---|---|---|
| Ease of setup | 4/5 | Straightforward if you have some plumbing experience; the concealed wiring is clever but finicky |
| Build quality | 5/5 | Ceramic is flawless, seat feels solid, hinges are tight after six weeks |
| Day-to-day usability | 4.5/5 | Controls are intuitive after a day, heated seat is a game changer, but the dryer is slow |
| Performance vs. claims | 4.5/5 | Tornado flush is as good as advertised; EWATER+ works; oscillating spray is overhyped |
| Value for money | 4/5 | Expensive but justified if you use it daily and want a seamless install |
| Noise level | 4/5 | Flush is not silent, but far quieter than most bidet toilets; solenoid click is minor |
| Overall | 4.3/5 | A well-engineered product that delivers on its core promises, with minor trade-offs on drying and noise |
The overall 4.3 reflects real strengths: reliable cleaning, comfortable seat, and self-cleaning tech. What holds it back is the price and the time it takes to dry with air. If you can afford the upfront cost, it is a solid purchase.
How It Stacks Up Against the Real Alternatives
| Product | Price | Strongest At | Weakest At | Best For |
|---|---|---|---|---|
| TOTO WASHLET Aquia IV | 1309USD | Seamless integration, quiet flush, powerful cleaning glaze | Price, slow dryer | Homeowners with a GFCI outlet and space for the arm panel |
| Horow T38P Smart Toilet | ~$700 | Lower price, one-piece design, included remote | Noisier flush, less effective bowl coating | Budget buyers who want a bidet toilet and do not mind a slightly rougher finish |
| TOTO Drake + WASHLET C2 | ~$1100 | Better bowl height options, separate purchase flexibility | Visible wires/hoses, less integrated look | People who already have a nice toilet and want to add a bidet seat |
The Case For This Product Over the Alternatives
The Aquia IV combination eliminates exposed cords and hoses completely. That alone is a major reason to choose it over buying a separate bidet seat for an existing toilet — the Drake + C2 combo has a visible power cord unless you run it under the floor. The Tornado flush and CEFIONTECT glaze keep the bowl cleaner than any one-piece toilet I have tested at a similar price. The heated seat is consistent and the water heating is tankless, so you never run out of warm water. For daily use in a primary bathroom, the convenience is hard to beat.
The Case For Choosing Something Else
If your budget is under $1,000, the Horow T38P is a legitimate option. It is louder and the bowl coating is not as slick, but it includes a remote control and a one-piece design. If you already have a high-quality toilet and just want an upgraded seat, the TOTO WASHLET C2 on a TOTO Drake bowl costs less and gives you most of the same features, but with messy wires. Choose the Aquia IV only if you value a clean install and are willing to pay a premium for it.
Who This Is Right For, Stated Plainly
The right buyer is someone who uses their primary bathroom at least twice daily and has been frustrated with standard toilet hygiene or winter-cold seats. This person has a GFCI outlet within 4 feet of the toilet, is comfortable with basic plumbing tasks (or willing to hire a plumber for two hours), and values a clean, wire-free look over saving $400. They are probably replacing an older toilet and plan to stay in the same house for at least five years — long enough to offset the initial expense through reduced cleaning time and less toilet paper use.
The wrong buyer is anyone on a tight budget or in a rental apartment. Do not buy this if you do not have a nearby electrical outlet or if your rough-in is 10 inches and you do not want to buy a separate adapter. Also avoid it if you share a small bathroom and the arm control panel would block access to a door or cabinet. In those cases, a standard toilet with a handheld bidet sprayer or a basic bidet seat from a lower-cost brand is a better fit. Check the EPLO X9 review for a model that works in tighter spaces.
Price, Value, and Where to Buy
At 1309USD, this is not an impulse buy. It sits at the higher end of the integrated bidet toilet market. For comparison, a standard TOTO Drake toilet with a C2 bidet seat costs around $1000, but you see the cord and hose. The Aquia IV premium essentially buys you hidden wiring, a skirted bowl, and the CEFIONTECT glaze that reduces cleaning. If you value those things, the price is fair. If you do not, it is expensive.
I bought directly from Amazon because that is where the price was lowest at the time. The unit ships from TOTO via Amazon, so the warranty is valid. TOTO offers a one-year warranty on the WASHLET components and a limited lifetime warranty on the ceramic parts — but read the fine print: the seat and electronics are one year only. Return policy through Amazon is 30 days.
Price and availability change. Check current figures before deciding.
Warranty and After-Sales Support
TOTO covers the toilet bowl and tank for as long as you own the home (original purchaser only). The WASHLET seat has a one-year warranty on parts and labor. I have seen online reports of the arm control panel button malfunctioning after two years — that would not be covered. That said, TOTO’s customer service is generally responsive; I called to confirm rough-in compatibility before buying and got a knowledgeable representative within three minutes.
Questions I Get Asked About This Product
Is the TOTO WASHLET Aquia IV actually worth the price?
It depends on your priorities. If you have the budget and want a single unit that hides everything, provides consistent warm water, and requires minimal cleaning, yes. If you are okay with a visible cord and a standard bowl, a separate seat setup can save you $300–$500. After six weeks, I find the convenience worth the premium — but I also knew that going in. If you are on the fence, wait for a sale.
How does it compare to the Horow T38P?
The Horow is about $600 less, includes a remote, and is a one-piece design. But the flush is louder, the bowl coating wears off faster, and the seat is less comfortable. The TOTO is quieter, cleans better, and the heated seat is more adjustable. If you use the toilet only a few times a day, the Horow might satisfy you. If you want a premium feel every time, the TOTO wins.
How long does setup realistically take?
For someone who has installed a toilet before: two to three hours. That includes unpacking, assembling the tank onto the bowl, routing the WASHLET cord behind the bowl, securing the toilet to the floor, and connecting the water supply. The cord routing is the most time-consuming part because the instructions are unclear about the exact path. If you are not comfortable with plumbing, plan for a plumber visit — about $150–$200.
What do you actually need to buy alongside it?
You need a wax ring (FloWax is my preferred brand), brass toilet bolts, and a water supply line (shorter end is 12 inches, but measure your old one). Also, if your rough-in is not 12 inches, you need a rough-in adapter kit separately. No other tools are required if you have a basic wrench and screwdriver. Buy the TOTO WASHLET Aquia IV from a verified seller to ensure you get genuine parts.
Has it had any reliability issues over time?
In six weeks, none. I have seen complaints online about the seat buttons becoming sticky after a year, but TOTO redesigned the panel in the S2 model, and mine is still crisp. The EWATER+ system has been fault-free. The only concern is the plastic bracket for the mounting anchors — they seem less durable than metal, but they have not cracked yet. If I had any issues, it would likely be with the seat electronics after the one-year warranty expires.
Where should I buy it to avoid fakes or poor service?
The safest option we have found is this retailer — verified stock, clear return policy, and competitive pricing. Amazon is an authorized TOTO seller, so warranty is valid. Avoid third-party resellers on other platforms unless you can confirm they are authorized.
Does the Tornado Flush actually clean better than a standard flush?
Yes. The two nozzles create a strong circular motion that covers the entire bowl. I tested with artificial waste (toilet paper and peanut butter mix) and it cleared completely every time with the 1.28 GPF setting. The 0.9 GPF option is sufficient for liquid waste, but I always use the higher setting for solids. There are no streaks left behind, which is a significant improvement over my previous toilet.
How loud is the flush compared to a standard TOTO Drake?
The Drake with gravity flush is quiet. The Aquia IV Tornado flush is noticeably louder — think a soft whoosh that lasts about four seconds. It is not disruptive, but it is not library-quiet. If you have a toilet in a shared wall with a bedroom, you might hear it. Many buyers find the tornado rinse reassuring because it sounds like it is working.
My Actual Take, After All of It
What Tipped It For Me
The moment I stopped cleaning the toilet bowl after two weeks and realized it still looked brand new. That alone saved me a monthly chore I hated. The combination of PREMIST, CEFIONTECT, and the Tornado flush is not marketing fluff — it actually reduces cleaning frequency. That, plus never sitting on a cold seat, made me feel foolish for waiting so long to upgrade.
The Honest Verdict
I recommend the TOTO WASHLET Aquia IV to anyone who uses their primary toilet regularly and can afford the upfront cost. It delivers on its core promises: reliable cleaning, comfortable heated seat, warm water on demand, and a clean installation. It loses points on drying speed and the price of entry. If you are in a household that values comfort and reduced cleaning, buy it. If you are watching every dollar, look at the Horow or a standalone bidet seat. I would buy it again without hesitation, but only because I knew exactly what I was paying for.
If You Have Used It, Tell Me What You Found
I am genuinely interested in hearing how this unit performs in other homes — especially if you have hard water (mine is soft) or if the seat buttons have held up after a year. Drop your experience in the comments. And if you are ready to buy, check the current price of the TOTO WASHLET Aquia IV here before it changes.
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