Get the Brondell Swash 1400 (10.0): full spec sheet, remote and a 3-year warranty. The TOTO Washlet S2 (8.6) is the only one that publishes its dryer temperature, up to 140°F. Check your outlet first.
Top pick: Brondell Swash 1400$519.99 at AmazonPrice as of Oct 24, 2026, 5:30 AM EDT
All three are electric elongated bidet seats with warm water, a heated seat and a warm air dryer. Each was new and in stock on Amazon on Oct 24, 2026. I’ve used these picks.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Can you plug it in where your toilet is?
Measure from the toilet’s rear corner to the nearest outlet. The checker compares that with each seat’s cord and shows each seat’s current draw.
The outlet is the part people forget. All three seats need 120 V, and their cords are short: 42 in. for the Brondell, 3.9 ft for the TOTO and 4 ft for the Bio Bidet, per their makers. If the nearest outlet is across the bathroom, plan on an electrician adding one behind the toilet.
Bio Bidet’s manual is the most specific. It says the seat must connect to a grounded 120 V GFCI outlet, recommends a separate circuit, and warns that sharing one can trip the breaker or make lights flicker. It allows only a three-prong extension cord into a proper GFCI outlet if one must be used, rated at least as high as the seat’s 10 A.
PlumbingPicks spec score out of 10, from Brondell, TOTO and Bio Bidet spec sheets, manual and product pages, read Oct 24, 2026. It is not a customer rating or our own test.
Best for a full spec sheet
Brondell Swash 1400
Luxury bidet toilet seat with remote control, S1400-EW
Spec sheet says 4 dryer levels, feature list says 3
Carbon deodorizer filter every 6 months
1,200 W max14.5 to 100 psi0.13 gpm max14.3 lb330 lb seat limit
Buy it if
You want a remote, a 3-year warranty and the most complete spec sheet, and your outlet is within 42 in. of the toilet.
Skip it if
Your outlet is farther than about 3-1/2 ft away. The TOTO and Bio Bidet cords are a few inches longer.
The Swash 1400 is the bidet seat I’d put on most toilets, and I’ve used it. It scored a full 10.0, passing all seven checks.
Brondell’s spec sheet is the most complete of the three. Water temperature has four settings: off at room temperature, 90, 95 and 100°F. The heated seat runs off, 89, 93 or 97°F. Maximum power is 1,200 W, and the seat heater alone is 50 W.
It washes with adjustable seven-position stainless steel nozzles, with oscillation, an aerated spray, a wide spray option and auto wash. The NozzleClean+ feature cleans the nozzles on demand. There’s a gentle-close seat and lid, an LED nightlight and a wireless remote that takes four CR2032 batteries and stores user settings.
Brondell publishes how to check fit. For the elongated seat, the center of the bolt holes to the front of the bowl should be 18 to 19.5 in.; round is 16 to 17.75 in.
Brondell’s sheet also warns the seat may hang slightly past the front of the bowl if the bolt holes are less than 1.5 to 2 in. from the tank, and that it will if the tank front to bowl front measures under 20 in., in which case it suggests the round size.
Supply pressure can be 14.5 to 100 psi, and the wash flows up to 0.13 gallons per minute. The elongated seat weighs 14.3 lb, measures 20.43 x 15.2 x 5.75 in., and is rated for 330 lb on the seat.
One inconsistency: Brondell’s feature list says a three-level warm air dryer, while the same sheet’s table says four dryer settings. Its product page shows a cUPC mark, and Brondell lists a limited 3-year tiered warranty.
The remote is the main control, and it’s the reason I’d pick this seat for a household with more than one regular user: the programmable settings store each person’s pressure and temperature. The quick-release seat lifts off for cleaning around the hinge.
The carbon deodorizer filter is rated for six months. Healthy Homestore sold the white elongated listing on Oct 24, 2026.
1,428 W max95 to 104°F water7.25 psi min16 lb shippingElongated
Buy it if
You want the brand-name standards list, an instant heater and a dryer with published temperatures, and you’re fine with a side panel instead of a remote.
Skip it if
A one-year warranty is too short for you. Brondell and Bio Bidet both give three years.
The Washlet S2 is one of TOTO’s current bidet seats, and I’ve used it. It scored 8.6.
TOTO’s spec sheet carries the longest standards list here: ASME A112.4.2, ASME A112.18.1/CSA B125.1, UL 1431 and CSA C22.2 #68, with back-siphonage testing to ASSE 1001 and CSA B64.1.1. It lists IAPMO cUPC certification.
It has an instantaneous water heater rather than a tank, which TOTO says gives continuous warm water. Water temperature adjusts from 95 to 104°F, the heated seat from 82 to 97°F, and the warm air dryer from 95 to 140°F with an airflow of 8.83 cubic feet per minute. That dryer range reaches the highest temperature of the three.
Cleaning features are TOTO’s selling point. PREMIST mists the bowl before each use, EWATER+ auto-cleans the wand after every use, and the wand cleans itself inside and out before and after use. TOTO says the seat design leaves no gap where dirt collects, and it adds CLEAN RESIN, a SoftClose seat, a night light, an air deodorizer and an energy saver mode.
TOTO lists power consumption of 1,273 W and a maximum of 1,428 W, the highest draw here, with a 3.9 ft cord. Water pressure must be at least 7.25 psi flowing and no more than 108.75 psi static. TOTO says to use it with potable water only and recommends a surge protector.
The one check it failed is the warranty: TOTO gives a one-year limited warranty, against three years from the other two.
TOTO’s auto energy saver lowers the seat temperature when the seat isn’t in use, and the docking station lets the seat slide off its plate for cleaning. Both help with the running cost and upkeep of a seat that stays plugged in all day.
Controls are on an arm panel at the side of the seat. Amazon.com sold the Cotton elongated listing on Oct 24, 2026; TOTO also makes it in Sedona Beige and a round version.
Best for highest rated wash flow
Bio Bidet BB-2000
Bio Bidet Bliss BB-2000 electric bidet toilet seat, elongated
1,400 W0.04 to 0.74 MPa0.185 gpm max10.5 lb4 ft cord
Buy it if
You want the highest rated wash flow of the three and a 3-year warranty, and you have a GFCI outlet on its own circuit.
Skip it if
You want exact water temperatures or a listing mark shown by the maker. Brondell and TOTO publish both.
The BB-2000 is Bio Bidet’s Bliss seat, and I’ve used it. It scored 7.1.
Its rated wash flow is the highest of the three: Bio Bidet’s manual gives a maximum of 0.7 liters per minute, 0.185 gallons per minute, for both rear and front wash, against 0.13 for the Brondell and 0.11 for the TOTO. Water pressure has five levels.
Bio Bidet’s documents disagree on the heater. The product page lists unlimited warm water and, in its feature list, “Hybrid Warm Water”, while the manual has a section titled draining the warm water tank. I couldn’t confirm which design it uses, so heater type isn’t part of the score.
Power is 120 V at 1,400 W, the heated seat element is 55 W, and the cord is 4 ft. It wants an inlet pressure of 0.04 to 0.74 MPa, about 6 to 107 psi.
It has a warm air dryer that runs for three minutes, a deodorizer, a night light, a seat sensor and, per the product page, a slow closing seat and lid. The manual says it rinses the nozzle automatically before and after each use, and a manual clean extends the nozzle for wiping.
Two checks failed. The manual lists water and seat temperatures only as room temperature, Low, Normal and High, without degrees. And neither the manual nor the product page shows a plumbing or electrical listing mark, which TOTO and Brondell both do.
The warranty is three years from Bemis, Bio Bidet’s parent, covering defects in material and workmanship. It excludes shipping and labor, including removal and reinstallation.
It has both a wireless remote and a side control panel. The manual describes an energy saver mode that holds the water and seat at 89.6°F while nobody is seated, and a silent mode; it also suggests keeping the lid closed and the temperature on low to save energy.
The elongated seat is 15.43 in. wide, 20.9 in. long and 5.98 in. tall, and weighs 10.5 lb per the manual, lighter than the 14.3 lb Brondell; Bio Bidet’s page gives a 17 lb shipping weight. Amazon.com sold it on Oct 24, 2026.
No maker spec sheets I could check against the listings.
Instant heater or warm water tank?
Seat
Heater type, per maker
Water temperature settings
TOTO Washlet S2
Instantaneous water heater
95 to 104°F, adjustable
Brondell Swash 1400
Ceramic water heater system
Off, 90, 95, 100°F
Bio Bidet BB-2000
Product page: unlimited warm water, “Hybrid Warm Water”; manual: a section on draining a warm water tank
Room, Low, Normal, High
A tank heater keeps a small reserve of water warm, so the wash is warm until the tank runs low. An instantaneous heater warms water as it flows, which TOTO says gives continuous warm water and saves energy. Either works for an ordinary wash; the difference shows up on long washes.
Bio Bidet’s troubleshooting guide says that if the water isn’t warm, set the temperature to High and wait about three minutes. Its documents don’t settle whether that’s a tank warming or an instant heater; either way, give it a few minutes after you change the setting.
Power, outlets and circuits
Seat
Max power
Max current at 120 V
Cord
Brondell Swash 1400
1,200 W
10.0 A
42 in.
TOTO Washlet S2
1,428 W
11.9 A
3.9 ft
Bio Bidet BB-2000
1,400 W
11.7 A
4 ft
Ten to twelve amps is a real load for a bathroom circuit, and another heavy appliance on the same circuit adds to it. That’s why Bio Bidet recommends a separate circuit and warns about tripping and flickering lights when one is shared.
An outlet near a toilet should be a GFCI. Bio Bidet requires one, and TOTO recommends a surge protector. Adding an outlet or a circuit is a job for a licensed electrician, and it beats running an extension cord across the floor to a bidet seat.
Will it fit your toilet?
Seat
Elongated seat size (L x W x H)
Fit guidance from the maker
Brondell Swash 1400
20.43 x 15.2 x 5.75 in.
Bolt holes to bowl front 18 to 19.5 in.; overhang warnings under 1.5 to 2 in. bolt holes to tank, or under 20 in. tank front to bowl front
TOTO Washlet S2
Drawing on TOTO’s spec sheet
Compatible with most elongated toilets, TOTO and others
Bio Bidet BB-2000
20.9 x 15.43 x 5.98 in.
Elongated and round versions
Measure from the center of the seat bolt holes to the front edge of the bowl. Around 18 to 19.5 in. is elongated; around 16 to 17.75 in. is round, using Brondell’s ranges.
Then check two more numbers from Brondell’s sheet: the bolt holes should be at least 1.5 to 2 in. from the tank, and the front of the tank to the front of the bowl should be at least 20 in., or the seat will overhang the bowl.
Skirted and one-piece toilets can have unusual bolt positions or tank shapes, so check before you order. If you’re choosing a new toilet anyway, an integrated unit may make more sense; see best toilet with built-in bidet.
Water pressure and the supply connection
Seat
Supply pressure range
Max wash flow
Brondell Swash 1400
14.5 to 100 psi
0.13 gpm
TOTO Washlet S2
7.25 psi flowing to 108.75 psi static
0.11 gpm front
Bio Bidet BB-2000
0.04 to 0.74 MPa (about 6 to 107 psi)
0.185 gpm
All three tee into the toilet’s cold supply with a T-valve. Measure your pressure with a gauge on a hose bib before you buy. If it’s above 100 psi, it’s above Brondell’s maximum and you need a pressure regulator for the whole house anyway.
Check the angle stop behind the toilet before you start. An old valve that won’t close fully, or one that leaks when you turn it, should be replaced first; see best shut-off valves.
Installing a bidet seat, step by step
1
Shut off and drain
Close the angle stop and flush to empty the tank.
2
Remove the old seat
Unscrew the seat bolts and lift it off.
3
Fit the mounting plate
Bolt the seat’s plate to the bowl and slide the seat on.
4
Add the T-valve
Fit it between the angle stop and the tank, then connect the bidet hose.
5
Open the water and check
Turn the supply on slowly and look for drips at every joint.
6
Plug in last
Bio Bidet says connect the water before the power cord.
Bio Bidet’s manual gives the order: turn off the water, drain the tank by flushing, unscrew the tank hose, remove the old seat. It also says not to plug in the power cord before the water supply hose is connected. TOTO’s seat uses a docking station, which makes taking it off for cleaning easier later.
Hand-tighten the plastic hose connections and stop when snug; overtightening cracks them. If a supply line is old, replace it now; see best toilet supply line.
Remote or side panel?
Seat
Controls, per maker
Extras
Brondell Swash 1400
Wireless remote with wall mount (4 x CR2032)
Programmable user settings
TOTO Washlet S2
Arm control panel at the side of the seat
Auto energy saver for the seat
Bio Bidet BB-2000
Wireless remote and side control panel
Energy saver at 89.6°F, silent mode
A remote can live on the wall where anyone can reach it, and it’s easier for someone who can’t twist to the side. A side panel can’t be lost and needs no batteries. If more than one person uses the seat every day, Brondell’s stored user settings save everyone from re-adjusting the pressure and temperature.
Which seat fits your bathroom?
If you…
Pick
Why
Want the longest warranty and a remote
Brondell Swash 1400
3 years, wireless remote, stored user settings
Want the standards list and published dryer temperatures
TOTO Washlet S2
UL 1431, CSA C22.2 #68, cUPC; dryer air 95 to 140°F
Want the highest rated wash flow
Bio Bidet BB-2000
0.185 gpm maximum, five pressure levels
Have an outlet about 4 ft away
TOTO or Bio Bidet
Their cords are 3.9 and 4 ft; Brondell’s is 42 in.
Are on a shared bathroom circuit
Brondell Swash 1400
Lowest maximum draw here at 1,200 W
Start from the outlet and the circuit, because those can rule a seat out before features matter. Then choose by what you’ll notice every day: who uses it, whether a remote helps, and how long you want the warranty to run. If you only want Bio Bidet models, the best Bio Bidet seat page compares that lineup.
Cleaning and upkeep
Task
Seat
Per the maker
Replace deodorizer filter
Brondell
Carbon, every 6 months
Clean the nozzle
All three
Automatic or on-demand cleaning; Bio Bidet also has a manual extend for wiping
Use mild cleaners
Bio Bidet
Neutral detergents only; no benzene or acid cleaners
Drain before freezing or storage
Bio Bidet
Manual has a section on draining the warm water tank
Clean the inlet strainer
Bio Bidet
A clogged strainer causes low pressure
Bio Bidet warns that chemical toilet bowl cleaners splashed on the seat can discolor it, and that only neutral detergents should be used. That applies to any plastic bidet seat. Wipe spills from bowl cleaner off right away.
Warranties, by maker
Maker
Term
Notes
Brondell
Limited 3-year tiered warranty
Per Brondell’s product page
TOTO
One-year limited warranty
Per the S2 spec sheet
Bio Bidet (Bemis)
3-year limited warranty
Excludes shipping and labor
A bidet seat has a heater, a pump or valve, a circuit board and a remote or panel, so the warranty term matters more than on a plain seat. That’s why the score has a check for three years or more. TOTO’s one year is the shortest here.
Questions people ask
What is the best bidet toilet seat?
On our spec score, the Brondell Swash 1400 (10.0), then the TOTO Washlet S2 (8.6).
Do bidet toilet seats need electricity?
Electric seats like these three do: 120 V, and Bio Bidet requires a GFCI outlet.
How much power does a bidet seat use?
Maximum 1,200 W for the Brondell, 1,400 W for the Bio Bidet and 1,428 W for the TOTO.
Will a bidet seat fit my toilet?
Measure bolt holes to bowl front: about 18 to 19.5 in. is elongated, per Brondell.
Can I install a bidet seat myself?
Yes, with basic tools, if there’s an outlet within reach of the cord.
Is an instant heater better than a tank?
An instant heater gives continuous warm water; a tank can run cool on long washes.
What water temperature do bidet seats reach?
TOTO S2 up to 104°F; Brondell 1400 up to 100°F.
Do bidet seats need a separate circuit?
Bio Bidet recommends one, since sharing can trip the breaker.
How long is a bidet seat warranty?
Three years from Brondell and Bio Bidet, one year from TOTO.
Can I use an extension cord?
Bio Bidet allows only a three-prong cord into a GFCI outlet; an added outlet is better.
How I picked these
Why trust me
I’m Isaac Daniels, a licensed journeyman plumber in Georgia (license #JP507711), and I’ve used all three picks. Every figure comes from Brondell’s, TOTO’s and Bio Bidet’s own spec sheets, manual and product pages, read Oct 24, 2026.
How I pick
Electric elongated bidet seats with warm water, heated seat and dryer only.
Genuine maker listings, new and in stock on Amazon on the day of the update.
Every pick scores 7.0 or more on the spec score below.
Prices come from Amazon’s API with the time they were read.
The spec score, check by check
The seven bidet seat checks below each count for one seventh of the score. A seat passes a check only when its maker’s own document says so. Passes are added and scaled to 10, to one decimal. No bench test, no customer reviews.
Check (weight)
How it’s scored
Listing shown by maker (1/7)
Pass if the maker shows a plumbing or electrical listing (cUPC/IAPMO, UL, CSA or ETL)
Max power published (1/7)
Pass if the maker gives maximum watts
Water temps in degrees (1/7)
Pass if water temperature settings are given in degrees; Low/High alone fails
Warm air dryer (1/7)
Pass if the maker lists a warm air dryer
Self-cleaning nozzles stated (1/7)
Pass if the maker states automatic, on-demand or self-cleaning nozzles
Seat dimensions published (1/7)
Pass if the maker publishes the seat’s dimensions or a dimensioned drawing
Warranty 3 years or more (1/7)
Pass if the maker’s warranty is three years or longer
Total
Passes ÷ 7 × 10, to one decimal
Seat
Listing
Power
Temps
Dryer
Nozzle
Size
Warranty
Score
Brondell Swash 1400
Pass
Pass
Pass
Pass
Pass
Pass
Pass
10.0
TOTO Washlet S2
Pass
Pass
Pass
Pass
Pass
Pass
Fail
8.6
Bio Bidet BB-2000
Fail
Pass
Fail
Pass
Pass
Pass
Pass
7.1
Sources
Brondell, Swash 1400 Luxury Bidet Toilet Seat with Remote Control spec sheet (models S1400-EW, -EB, -RW, -RB) and product page, brondell.com, read Oct 24, 2026.
TOTO USA, Washlet S2 Elongated SW3346 specification sheet SS-02273 v.04, and Washlet S2 product page, totousa.com, read Oct 24, 2026.
Bio Bidet, BB-2000 owner’s manual (English, 12.11.25) and Bliss BB-2000 product page, biobidet.com, read Oct 24, 2026.
U.S. Consumer Product Safety Commission, SaferProducts recall API searches for bidet, Brondell, TOTO, Bio Bidet and Bemis, Oct 24, 2026 (no bidet seat recalls).
Amazon product data for B06Y32FG2N, B0FCTR1Y75, B00GRM11R6 and B09JTQ2YFP, read through the Creators API on Oct 24, 2026.
