TOTO WASHLET S5 vs S7 vs S7A: Which Bidet Seat Should You Choose?

TOTO WASHLET S5 vs S7 vs S7A: What’s the Real Difference?

TOTO’s S series is the heart of the WASHLET lineup, and the S5, S7 and S7A are the three seats customers ask us about most. At first glance they look almost identical. All three give you endless warm water, a heated seat, a warm air dryer, a deodorizer, EWATER+ and a wireless remote. The differences are in the details: how much you can fine-tune your comfort, how slim each seat sits, how much it automates and how long the warranty runs.

At Bliss Bath and Kitchen, we carry the full TOTO collection, from WASHLET bidet seats to fully integrated NEOREST smart toilets. This guide breaks down the three S-series seats so you can pick the right one for your bathroom without paying for features you won’t use.

Quick Comparison at a Glance

What All Three Seats Have in Common

Before getting into the differences, it helps to know how much you get with any S-series WASHLET. These are all premium bidet seats, and even the S5 is a big step up from a basic model.

• Endless warm water: an instantaneous heater warms water on demand, so it never runs cold, even with back-to-back use.
• Custom cleansing: front, rear and soft rear sprays, with oscillating and pulsating options and adjustable pressure, temperature and wand position.
• PREMIST: mists the bowl before each use so waste is less likely to stick.
• EWATER+: electrolyzed water cleans the wand automatically, with no harsh chemicals.
• Everyday comforts: a heated seat, warm air dryer, automatic deodorizer and built-in night light.
• Four user presets: each person in the house can save their preferred settings on the wireless remote.
• WASHLET+ compatibility: paired with a WASHLET+ ready TOTO toilet, the power cord and water line tuck out of sight.

TOTO WASHLET S5: The Smart Value Pick

The S5 is TOTO’s most accessible remote-controlled S-series seat, and it covers everything most households want from a WASHLET. Its tankless design is noticeably slimmer than the older C5 it replaces, and its rounded corners and streamlined hinge make it easier to wipe down.

Where the S5 saves money is in the finer details. It offers three temperature settings for the water, seat and dryer instead of five, and it doesn’t include Wide Front Cleanse. The seat uses a weight-activated switch in the hinge instead of a skin sensor, and it sits a bit taller at the back. It isn’t compatible with TOTO’s auto flush kit, and it carries a one-year limited warranty. It’s available in both elongated and round versions.

Best for

Guest bathrooms, powder rooms and anyone who wants TOTO quality without the premium price.

TOTO WASHLET S7: The Sweet Spot for Primary Bathrooms

The S7 is where the S series starts to feel truly high-end. The biggest upgrade is comfort control: five temperature settings for the water, seat and dryer let you dial in exactly what you like, and Wide Front Cleanse adds a broader, gentler front spray. EWATER+ keeps the wand and bowl cleaner between uses.

The S7 also looks more refined. Its lower-profile design sits close to the bowl for a nearly integrated appearance, and it comes with TOTO’s multifunction wireless remote. A silent skin-detection sensor replaces the S5’s hinge switch. The S7 can also be paired with TOTO’s optional auto flush kit on select compatible TOTO toilets, and it’s backed by a two-year limited residential warranty. It’s available in contemporary and classic elongated versions, plus a round version. What it doesn’t have is an automatic lid.

Best for

Primary bathrooms and busy family bathrooms, where finer comfort settings, a sleeker look and longer warranty coverage make the biggest difference day to day.

TOTO WASHLET S7A: The Most Automated Option

The S7A takes everything the S7 offers and adds TOTO’s automatic open and close lid. The lid lifts as you approach and closes after you leave, reducing the need to touch it. Pair the S7A with a compatible TOTO toilet and optional auto flush kit to add automatic flushing as well.

Like the S7, the S7A has Wide Front Cleanse, five temperature settings, a lower-profile design and a skin-detection sensor. It uses TOTO’s multifunction wireless remote and carries a two-year limited residential warranty. It’s available with TOTO’s flush-fitting contemporary lid or a classic lid in elongated versions, plus a round version.

Best for

Luxury ensuites, anyone who values touch-free convenience, and households with aging-in-place or mobility needs, where not having to bend down to a lid is a real benefit.

WASHLET+ and Auto Flush: Getting the Cleanest Look

All three seats fit most standard toilets, but pairing them with a WASHLET+ ready TOTO toilet takes the installation up a level. The power cord and water supply hose route through a channel under the seat, so there’s nothing visible hanging off the side of the bowl.

If auto flush is on your wish list, choose the S7 or S7A, pair it with a compatible TOTO toilet, and add the auto flush kit that matches your flush type. The S5 doesn’t support auto flush. If you’d prefer the bidet built right into the toilet, our intelligent and smart toilets collection is worth a look.

Before You Buy: Fit and Installation Tips

• Measure your bowl: confirm whether your toilet is round or elongated. The S5, S7 and S7A are available for both bowl shapes, but model numbers differ.
• Check the bowl shape: toilets with a pronounced “French curve” or unusual rim may not be compatible, and some one-piece toilets need verification against TOTO’s compatibility list.
• Plan for power: every WASHLET needs a grounded GFCI outlet within reach of the cord. If there isn’t one near the toilet, have a licensed electrician add it before installation.
• Protect the electronics: TOTO recommends a surge protector to guard against power spikes.
• Think about remote placement: all three remotes mount on the wall and communicate by infrared, so keep a clear line to the seat.

Which TOTO WASHLET Should You Choose?

Choose the S5 if you want TOTO’s core WASHLET experience at the most accessible price. It’s a great fit for a guest bathroom or powder room.

Choose the S7 if the seat is going into your main bathroom. Wide Front Cleanse, five temperature settings, the lower-profile design, the option to add auto flush and a two-year warranty make it the best all-round choice for daily use.

Choose the S7A if you want the most automated option. The automatic lid makes it ideal for a luxury ensuite and genuinely helpful for anyone with limited mobility.

Final Thoughts

There’s no wrong choice in TOTO’s S series. It comes down to how much comfort control and automation you want. The S5 delivers outstanding comfort for the money, the S7 is the smartest upgrade for a primary bathroom, and the S7A is the most automated of the three. Whichever you choose, pairing it with a WASHLET+ ready TOTO toilet gives you the cleanest, most integrated look. If you’re not sure which model fits your toilet, our team is happy to help.

Shop TOTO WASHLET at Bliss Bath and Kitchen, with shipping across Canada.