TOTO WASHLET S7 Review: The Flagship Wash, Minus the Auto Lid

Instant warm water, the TOTO way

The S7 opens its case with the heater, and it is the instantaneous kind that defines TOTO's S-series.

TOTO promises an instant and continuous warm water stream will last as long as you need it, fed to AIR-IN WONDER WAVE that provides a gentle, yet effective clean by infusing air into each droplet. You drive it with a convenient remote that allows users to control and set personalized water cleansing settings, and it stores 4-user memory settings for quick access so each member of the household keeps their own.

Because the heating is instantaneous rather than a reservoir tank, the warm water does not run cold partway through — the same architecture as the step-up S7A and the cheaper TOTO WASHLET S5. The table maps the S7's core feature set to what each part does for the buyer.

The wash modes

Beyond the aeration, the S7 gives you control over how the spray moves, not just how warm it is.

The wand carries oscillating and pulsating functions — the first sweeps for wider coverage, the second adds a rhythmic massage — on top of the standard front and rear cleanse. Paired with the AIR-IN aeration, it is a tunable wash rather than a single fixed jet. The map below lays out the cleansing modes.

Self-cleaning: EWATER+, PREMIST, deodorizer

The part that keeps the S7 low-maintenance is the trio of features that clean the bowl and wand for you.

EWATER+ cleans the inside and outside of the wand before and after use, while PREMIST helps prevent waste from adhering by misting the toilet bowl before each use so less sticks in the first place. Odor is handled too: an air deodorizer neutralizes bathroom odors with powerful air filters. Together they are the reason TOTO owners describe the bowl as staying clean with little effort.

EWATER+ and PREMIST are the features that separate a TOTO washlet from a budget seat — they work on the bowl and wand between every use, not just during the wash.

Comfort: heated seat, dryer, nightlight

The comfort layer is identical to the S7A's, which is the whole point of buying the cheaper sibling.

The seat is the daily standout: a SoftClose heated bidet seat provides consistent warmth coverage over the full seat surface, so there are no cold edges. After the wash, an adjustable warm air dryer provides easy clean up, and at night a nightlight gently illuminates the room so you skip the overhead light. As on most washlets, treat the dryer as a finishing breeze rather than a full hands-free dry.

What owners say

The review pool is small but strikingly consistent — and the strongest signal is repeat buying.

The headline is loyalty: one owner reports they installed the first on a house we sold and liked it so much we bought two more, and another notes they had been shopping for a bidet seat for over six months before landing on the S7. Over several months of ownership the verdict holds — all 8 extracted reviews were verified purchases, averaging 4.63 stars, above the seat's headline rating. TOTO leans on scale to back the trust: 60 million WASHLET users agree TOTO electronic bidet toilet seats are trusted and dependable.

"Installed the first on a house we sold and liked it so much we bought two more." — an S7 owner, the strongest endorsement a product gets.

The S7 vs the S7A: what you give up

This is the decision that matters, because the two seats are otherwise the same machine.

The S7A's headline upgrade is an automatic open/close lid that senses you. The S7 skips it — you lift the lid yourself — and that is essentially the entire difference. Compared to the S7A, the S7 keeps the identical AIR-IN wash, EWATER+, PREMIST, SoftClose heated seat, and instant warm water, and it is TOTO auto flush compatible with a separately sold kit just like its sibling. One owner who has used both prefers the S7 for everyday use, finding its buttons more responsive — so the cheaper seat is not a compromise on the wash at all. Our full S7 vs S7A comparison weighs whether the hands-free lid earns the step up.

Install and fit

Getting the S7 on your toilet is a weekend job, not a plumber's call-out.

TOTO promises easy DIY installation, and the S7 fits most standard toilets, including TOTO WASHLET+ toilets with concealed connection. The reviewed unit is the TOTO WASHLET S7, an elongated electronic bidet seat in Cotton White; like any electric seat it needs a grounded outlet near the bowl, so confirm you have one before ordering.

Our verdict on the S7

The S7 earns a strong recommendation for one buyer: someone who wants TOTO's flagship wash — AIR-IN, EWATER+, PREMIST, instant warm water, a heated seat — and does not care about an automatic lid enough to pay the S7A premium.

It is the wrong seat only if the hands-free lid is the feature you most want, in which case the TOTO S7A is your seat, or if you want to spend less and accept a reservoir-tank step-down like the TOTO WASHLET S5. Despite its premium price, owners rate the S7 4.63 and buy multiples — that loyalty is the clearest verdict there is. Shoppers can also weigh TOTO bidet seats against lower-cost Kohler bidet seats and Brondell bidet seats before committing.