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TOTO Aquia IV Washlet+ S5 One or Two-Piece 1.28 & .9 Gpf

TOTO Aquia IV Washlet+ S5 One or Two-Piece 1.28 & .9 Gpf

SKU: MW6463446CEMFGN#01

Price: $1,587.00
List Price: $2,266.00
Price: $1,587.00
You Save: $679.00 (30%)
Toilet Style
Rough-In Size
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  • 1 Year Warranty

Clean Lines, Smart Features, One or Two Pieces

The TOTO Aquia IV WASHLET+ S5 Toilet offers versatile installation options with sleek, modern styling and integrated bidet technology. Available in both one-piece and two-piece configurations, the Aquia IV adapts to your space and aesthetic preferences. The one-piece version features a zero-gap tank-to-bowl connection, enhancing both cleanliness and form.

Regardless of configuration, the Aquia IV features top-mounted chrome push buttons for easy, dual-flush operation—1.28 GPF for solids and 0.9 GPF for liquids—allowing you to save water without compromising performance. Paired with TOTO’s DYNAMAX TORNADO FLUSH® and CEFIONTECT® glaze, this toilet keeps the bowl cleaner with each flush.

Bidet Technology That Elevates Every Day

  • This toilet is compatible with 10", 12", or 14" rough-ins using TOTO’s UniFit® adapter system, giving you flexibility for renovations or new builds. The Universal Height bowl ensures optimal comfort for most adults, and the skirted design simplifies cleaning around the base.

    The system includes the WASHLET+ S5 bidet seat, which seamlessly integrates with the toilet while concealing water and power lines. Key features include instantaneous warm water, a heated seat, warm air dryer, and automatic deodorizer, all controlled via a remote for a luxurious, hygienic experience.

  • Every WASHLET+ S5 system includes PREMIST®, which sprays the bowl before each use to reduce waste adhesion. After use, EWATER+® electrolyzes ordinary water to sanitize the bidet wand inside and out—offering daily cleaning without chemicals.

    The Aquia IV’s skirted base eliminates dust-collecting grooves, while the one-piece version’s zero-gap design further minimizes areas where grime can hide. Whether in one- or two-piece form, this system is built to support everyday hygiene with minimal upkeep.

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Comfort That Adjusts to You

The WASHLET S5 uses a sleek, wireless remote control to manage all settings. Users can fine-tune water pressure, temperature, nozzle position, and toggle between oscillating and pulsating spray modes. The remote also controls the warm air dryer, nightlight, and heated seat with intuitive ease.

With four programmable user presets, each household member can store their preferred settings. The remote can be wall-mounted or used handheld, giving you complete control over every session in a format that’s both elegant and user-friendly.

Efficient Performance, Built to Last

From its refined silhouette and smooth ceramic finish to its customizable bidet functionality, the Aquia IV WASHLET+ S5 system is the perfect fusion of design and performance. Whether you choose the space-saving one-piece or the flexible two-piece version, you’ll enjoy reliable dual-flush efficiency, intuitive comfort features, and long-term hygiene support.

This system is an excellent choice for homeowners seeking a stylish, low-maintenance toilet with the convenience of smart bidet technology built right in.

Aquia IV Washlet+ S5 Features

Comfort & Convenience

  • Heated Seat: Adjustable warmth delivers comfort in all seasons.
  • Warm Air Dryer: Provides a gentle, paper-free finish with multiple fan speeds.
  • Automatic Deodorizer: Eliminates odors using built-in air filtration.
  • Nightlight: Soft LED illumination enhances nighttime visibility.
  • SoftClose Lid & Seat: Prevents slamming for a quieter experience.

Advanced Hygiene

  • Tankless Instant Warm Water: Delivers endless warm water without waiting.
  • Oscillating & Pulsating Spray: Provides thorough, adjustable cleansing coverage.
  • Front & Rear Wash Modes: Tailored hygiene options for different needs.
  • Nozzle Adjustment: Customize position for your perfect fit.
  • Water Pressure & Temp Control: Fine-tune comfort settings via remote.

Personalization & Control

  • EWATER+® Self-Cleaning: Electrolyzed water sanitizes the wand before and after use.
  • PREMIST® Bowl Spray: Mists the bowl to reduce residue before use.
  • Quick-Release Seat: Easily removable for thorough cleaning.
  • Skirted Design: Minimizes dirt buildup around the toilet base.
  • Zero-Gap Option: One-piece version offers seamless tank-to-bowl design.

Smart Performance

  • One- or Two-Piece Models: Choose between compact or modular styling.
  • Top-Mounted Push Button Flush: Dual flush (1.28 & 0.9 GPF) for easy water savings.
  • 10", 12", or 14" Rough-In Options: Installs easily with UniFit® adapters.
  • Universal Height: Comfortable for a wide range of users.
  • WASHLET+ Integration: Concealed supply lines for a cleaner finish.

Elegant & Thoughtful Design

  • Wireless Remote Control: Easily manage all bidet settings from anywhere in the room.
  • 4 User Presets: Save custom settings for multiple household members.
  • Dual Flush Efficiency: Use only the water you need, every time.
  • Auto Energy Saver: Lowers energy use during idle periods.
  • CEFIONTECT® Glaze: Ultra-smooth ceramic resists waste and reduces cleaning needs.

Aquia IV Washlet+ S5 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!

Aquia IV Washlet+ S5 Resources

TOTO Aquia IV Washlet+ S5 One-Piece Spec Sheet

TOTO Aquia IV Washlet+ S5 Two-Piece Spec Sheet

TOTO Washlet S5 Details

TOTO Aquia IV Washlet+ Spare Parts Manual

TOTO Aquia IV Washlet+ Installation Manual

Customer Reviews

Based on 3 reviews
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I
Igor Krivenko

very good

C
Christopher Janson
Zero regrets

This was the right toilet/bidet and the right store to purchase from. Got a great price and the company reached out after delivery to ensure everything was okay. Love the way it looks and operates and the skirted design is easy to clean. The bidet component is customizable with a lot of options, which we appreciate.

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H
Hagop Shirvanian
Amazing Customer Service

Ordering online was super easy. Delivery was pretty quick. Unfortunately the toilets even thou they were on the pallet, seems like the freight company had a quick stop and took a tumble. They were super nice in helping me unpack to verify the damage and they took it back without any hesitation. I called over to House of Bidets and they asked me if i took any pictures which i did, I sent it over and within the same day we had a replacement toilet on order. Thank you for taking care of this. This is a company that I would buy from and also refer over to anyone thats looking for toilets.