Toto

TOTO Aquia IV Arc Washlet+ S2 Two-Piece 1.28 & .9 Gpf

SKU: MW4483346CEMFGN#01

Regular price: Price: $1,251.00
Regular price: List Price: $1,787.00
Sale price: Price: $1,251.00
Unit price: per

Rough-In Size 12" 10" 14"

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Clean Curves, Elevated Experience

The TOTO Aquia IV Arc WASHLET+ S2 Two-Piece Toilet brings a soft, architectural touch to the bathroom with its curved tank and smooth skirted base. The Arc version of the Aquia IV softens the overall aesthetic with gently rounded edges, making it a versatile choice for design-forward spaces. With concealed water and power connections through the WASHLET+ system, the installation stays visually clean and free of clutter.

Featuring DYNAMAX TORNADO FLUSH®, this dual-flush toilet uses 1.28 GPF for solids and 0.9 GPF for liquids, providing powerful, efficient performance. The CEFIONTECT® ceramic glaze ensures a smoother surface that helps prevent buildup and reduces cleaning frequency.

Smooth Integration. Reliable Comfort.

With support for 10", 12", or 14" rough-ins using TOTO’s UniFit® adapters, the Aquia IV Arc WASHLET+ S2 offers flexible installation for nearly any space. Its Universal Height bowl delivers ergonomic seating comfort, while the two-piece design allows easier transport and fitting during remodels.

The included WASHLET S2 offers a built-in bidet experience with key comfort features: continuous warm water cleansing, a heated seat, warm air dryer, and automatic deodorizer. The seamless integration hides external connections, preserving the clean, modern aesthetic of the Arc design.
Like all WASHLET+ systems, the Aquia IV Arc S2 includes PREMIST®, which lightly sprays the bowl before each use to help reduce waste adherence. After cleansing, EWATER+® sanitizes the bidet wand automatically using electrolyzed water, promoting daily hygiene with minimal user effort.

The fully skirted bowl eliminates hard-to-clean crevices around the trapway, and the smooth ceramic surfaces reduce grime accumulation. With all cords and supply lines tucked away, the Aquia IV Arc maintains both form and function with low-maintenance efficiency.

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Simple Controls, Powerful Features

The WASHLET S2 is operated via a fixed side-arm control panel, mounted to the right of the seat. From this intuitive panel, users can adjust water temperature, pressure, nozzle position, and switch between front/rear wash modes. Spray styles include both oscillating and pulsating cleansing for improved comfort.

Also accessible are the heated seat, dryer, and energy-saver settings—all clearly labeled for straightforward use. The side panel offers direct access to every function without needing to store, charge, or configure a remote—ideal for households that value simplicity and reliability.

Formed for Style and Comfort

The Aquia IV Arc WASHLET+ S2 blends style and function into a thoughtfully engineered system that fits a wide range of homes. Whether you're upgrading for water savings, hygiene, comfort, or all three, this dual-flush toilet with integrated bidet delivers everyday benefits in a soft, modern silhouette.

From its rounded tank and hidden connections to its sustainable flushing system and core TOTO cleansing features, the Arc WASHLET+ S2 is a practical upgrade wrapped in refined design.

TOTO Aquia IV Arc Washlet+ S2 Features

Comfort & Convenience

Heated Seat: Adjustable seat warmth for comfort in colder weather.
Warm Air Dryer: Gentle drying after cleansing helps reduce toilet paper use.
Automatic Deodorizer: Built-in air filter neutralizes odors during and after use.
Nightlight: Soft LED lighting helps guide nighttime use.
SoftClose Seat & Lid: Prevents slamming and adds to a quieter bathroom.

Advanced Hygiene

Endless Warm Water: Tankless heater delivers continuous, on-demand warm water.
Dual Spray Modes: Oscillating and pulsating functions provide full coverage.
Front & Rear Wash: Separate spray options for thorough personal cleansing.
Nozzle Adjustment: Move the spray wand forward or back for customized reach.
Pressure & Temp Control: Adjust water strength and warmth via side panel.

Personalization & Control

EWATER+® Wand Cleaning: Sanitizes the nozzle inside and out after every use.
PREMIST® Bowl Spray: Sprays bowl surface before use to prevent waste adhesion.
Quick-Release Seat: Easily removes for deep cleaning access.
Skirted Base: Smooth outer bowl surface minimizes dirt traps.
Antibacterial Materials: Reduces microbial buildup on key surfaces.

Smart Performance

Arc Tank Shape: Softly curved tank adds elegance and a modern feel.
Two-Piece Construction: Simplifies transport and installation in tight areas.
Universal Height: Comfortable seating for a variety of users.
10", 12", or 14" Rough-In: Works with multiple layouts using UniFit adapters.
WASHLET+ Integration: Hidden power and water lines for a cleaner look.

Elegant & Thoughtful Design

Dual Flush (1.28 & 0.9 GPF): Choose a light or full flush to save water as needed.
Tankless Heating: Uses energy only when warm water is required.
Air Dryer Feature: Cuts back on paper waste for more sustainable routines.
Energy Saver Mode: Reduces seat temperature and power use when idle.
CEFIONTECT® Glaze: Ultra-smooth ceramic reduces grime and stains.

TOTO Aquia IV Arc Washlet+ S2 Installation

TOTO Washlet+ systems install like a classic toilet. There are only a few additional factors to consider:

Check the size of the rough-in in your bathroom (the distance from the finished wall behind your toilet to the center of the toilet drainpipe or flange). All Washlet+ models are designed for a 12" rough-in, but if you have another size, most models have adapters available.
Access to a standard GFCI electrical outlet is required for your Washlet to function.
Your Washlet will utilize the same water connection that fills the toilet's tank via an included T-valve.
See the video guide below for installation of your new Washlet+ system!