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TOTO Aquia IV WASHLET+ S550e Two-Piece Toilet - 1.28 GPF and 0.8 GPF

TOTO Aquia IV WASHLET+ S550e Two-Piece Toilet - 1.28 GPF and 0.8 GPF

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Aquia IV WASHLET+ S550e Two-Piece Toilet – 1.28 GPF and 0.8 GPF

TOTO couples efficiency with comfort and style in the TOTO Aquia IV WASHLET two piece toilet system. This system comes with both the toilet and WASHLET, which are  designed to fit together perfectly so that the bidet seat’s water hose and power cord are neatly concealed out of view, giving you a clean, seamless look. Do note, however, that the toilet included in this WASHLET+ system is only intended to hide the cords and hoses of the S550e bidet seat that comes with it. In other words, this particular toilet won't hide the water and electricity connections of any different bidet seats you may wish to install in the future. The toilet itself features TOTO’s quiet yet high-powered DynaMax Tornado Flush system that’s capable of cleaning every part of the bowl, along with two flush options (1.28 GPF or 0.8 GPF) for maximum efficiency. In addition, the toilet’s modern push-button flush mechanism and sleek, skirted design are easy to clean and will increase the style factor of any bathroom.

The S550e bidet seat that comes with this TOTO Aquia IV WASHLET two piece toilet system is just as streamlined and stylish as the toilet itself and comes with a variety of high-end features. For starters, the S550e’s four wash modes (rear, rear soft, front and wide front) feature adjustable water temperature and pressure, an aerated stream that simultaneously cleans and soothes, as well as pulsating and oscillating spray options for enhanced comfort. The instant water heating system guarantees that you’ll always have enough warm water for washing, and the warm air dryer comes with five temperature settings to ensure a comfortable drying experience. The adjustable heated seat keeps you warm when using the restroom, and the automatic deodorizer discreetly keeps any embarrassing bathroom odors from lingering. A convenient built-in nightlight assists with navigating the bathroom in low light, and the automatic lid senses when a user approaches or walks away from the toilet and opens or closes accordingly. The WASHLET is operated via a convenient remote that includes two user presets. These allow frequent users to pre-program their favorite settings for a completely customized wash cycle at the touch of a button. Keeping the toilet and WASHLET clean is easy thanks to the automatic PREMIST function and the bowl’s ultra-smooth CeFiONtect glaze, which work together to create a slippery surface that repels waste and dirt. In addition, the TOTO Aquia IV WASHLET two piece toilet's nozzles automatically self-sterilize with electrolyzed water after each use. Last but not least, this system is available in both non-auto flushing and auto-flushing models, the latter of which uses a sensor to detect when a user is standing up and moving away from the unit and flushes the toilet.

With its stylish look and top-tier features, the TOTO Aquia IV WASHLET two piece toilet system is guaranteed to take your toileting experience to the next level!



  • Purchase includes toilet and WASHLET
  • Elegant, skirted toilet is easy to keep clean
  • Ultra high-efficiency DynaMax Tornado Flush system with chrome push button
  • Quiet, dual flush (1.28 GPF or 0.8 GPF)
  • CeFiONtect glaze and PREMIST feature stop residue from sticking to bowl
  • 2.5” trapway with clear glaze helps prevent clogs
  • WASHLET features a dual action spray with four wash modes and oscillating and pulsating spray options
  • Soothing, aerated wash stream provides superior relaxation and cleansing 
  • Instant water heating system ensures unlimited warm wash water
  • Adjustable water temperature and pressure
  • Warm air dryer with five temperature settings
  • Adjustable heated seat with quick release feature for easy cleaning
  • Automatic deodorizer
  • Built in nightlight
  • Automatic open/close lid
  • Energy saving mode
  • Two programmable user presets
  • EWATER+ automatically sterilizes the bowl and wand with each use
  • Non-auto flushing and auto-flushing models available
  • Wireless remote control
  • Comes in white
  • Elongated bowl and seat
  • 12” rough-in (10” and 14” rough-in unifit components can be purchased separately)
  • 1 year warranty


Additional Information

Model Number(s)

TOTO Aquia IV WASHLET+ S550e System in Cotton WhiteMW4463056CEMG(#01)

TOTO Aquia IV WASHLET+ S550e System with Auto Flushing in Cotton White – MW4463056CEMGA(#01)

TOTO Aquia IV Elongated Bowl – CT446CUGT40

TOTO Aquia IV Tank and Cover – ST446EM

TOTO WASHLET S550e with Contemporary Design, non Auto Flush Compatible – SW3056T40

TOTO WASHLET S550e with Contemporary Design, Auto Flush Compatible – SW3056AT40

TOTO WASHLET Adapter – 9AU321-A

TOTO Auto Flush Kit – THU765

Optional Unifit 10” Rough-In (Sold Separately) – TSU08W.10

Optional Unifit 14” Rough-In (Sold Separately) – TSU08W.14


WASHLET+ S350e Parts Manual

WASHLET+ S350e Instruction Manual

WASHLET+ S350e Spec Sheet

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The TOTO Washlet+ comes with a 1 year full warranty for residential use, and a 1 year full warranty for units installed for commercial use.


We cover tax at the prices quoted, so no need to worry about a surprise tax fee added on during checkout, we've got you covered!


We also pay for shipping, so the price you see is the price you get!

TOTO Washlet+ units ship via freight, and ships on a pallet.  The shipper will call you when the unit is in your area and ready to be delivered. This allows you to schedule delivery, so you don't need to worry about it being delivered when you're not home.  Because toilet bowls are fragile, we recommend looking over the unit quickly when it arrives.  It's very rare for anything to be cracked, but it has happened.  We see about a 5% break rate, meaning about 1 in 20 have damage. When the unit arrives, look it over before signing for it. If anything is broken, don't sign for the package. Instead, take pictures and email them to or text them to 248-974-4030, and refuse delivery. This allows us to file a claim with the shipper and get another one out to you within 24 hours.


Because of the fragile nature of toilet bowls, returning one is a tricky process.  Should a return be required on your Washlet+ unit, TOTO requires that it be shipped back via freight, and shipped back on a pallet.  TOTO also charges a restocking fee of 30%, and will not cover shipping either way. TOTO also requires that the unit come back in 100% brand new condition. If the unit comes back in any condition other than 100% brand new, resellable condition, no refund of any sort will be issued.

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