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TOTO Guinevere WASHLET+ S5 One-Piece Toilet - 1.28 GPF - White toilet on a white background

TOTO Guinevere WASHLET+ S5 One-Piece Toilet - 1.28 GPF

by TOTO
SKU MW9743446CEFG#01
UPC/GTIN: 739268478404
$1,717.00
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TOTO Guinevere

  • Tornado Flush: Centrifugal, cyclonic rinsing action utilizes two powerful nozzles to clear the bowl efficiently at an eco-friendly 1.28 GPF volume
  • CEFIONTECT Glaze: Smooth ceramic finish minimizes surface friction to keep waste from adhering and simplify maintenance
  • Concealed Connection: Specifically molded housing channels hide all bidet hoses and electrical cords out of sight
  • EWATER+ Tech: Electrolyzed water automatically rinses the spray nozzle and bowl to maintain standard cleanliness and daily care
  • Universal Height: Posture-friendly seating height mimics a standard chair to provide comfort for users of all mobilities
  • Fully Skirted Design: Smooth ceramic apron encloses the internal trapway entirely, removing tedious dust collection spots
  • ADA Compliant: Serves people of every age and capability, optimizing the bathroom experience for accessibility
TOTO Guinevere WASHLET+ S5 One-Piece Toilet - front view
TOTO Guinevere WASHLET+ S5 One-Piece Toilet - Toilet with Cefiontect technology illustration showing waste minimization on a dark background

Easy-Clean Glaze

The CEFIONTECT glaze creates an extraordinarily smooth ceramic surface that helps keep the bowl clean. By preventing debris and mold from adhering to the porcelain, it ensures that routine bathroom maintenance requires less time and effort. A common feature in Toto One Piece Toilets.

TOTO Guinevere WASHLET+ S5 One-Piece Toilet - Tornado flush

Powerful Tornado Flush

The TORNADO FLUSH system utilizes two powerful nozzles to create a centrifugal, cyclonic rinsing action with a 1.28 GPF volume. It delivers a strong and efficient clean with every flush, sweeping away waste efficiently.

TOTO Guinevere WASHLET+ S5 One-Piece Toilet - side view

Smooth Trapway Design

The fully skirted design conceals the trapway completely, featuring smooth lines that eliminate the dusty curves found on traditional toilets. It ensures a sleek look while improving external wipe-down maintenance.

TOTO Guinevere WASHLET+ S5 One-Piece Toilet - top view

Comfort and Convenience

Universal height, a spacious elongated bowl, and the premium integrated electronic bidet features make it exceptionally comfortable and easy to use every day while meeting modern accessibility standards.

TOTO Guinevere WASHLET+ S5 One-Piece Toilet 

The Guinevere represents a modern evolution in everyday performance, combining a rich, traditional architectural aesthetic with advanced flushing and water-wash technologies. Its fully skirted one-piece form features elegant classic detailing that creates a visually refined profile that is exceptionally easy to maintain. Equipped with an efficient 1.28 GPF TORNADO FLUSH® system and a smooth CEFIONTECT® ceramic glaze, it ensures consistent rinsing results while maintaining a premium everyday bathroom experience. As an integrated WASHLET+ system, it seamlessly combines advanced ceramic tech with the premium electronic S5 bidet seat to transform everyday routines into a refined, comfort-focused experience.

Perfect for those looking for a classic, traditional smart bidet toilet system featuring eco-friendly 1.28 GPF water conservation, a completely skirted decorative base, and a unified one-piece construction.

TOTO Guinevere WASHLET+ S5 Specifications and Features

  • Advanced Electronic Bidet Seat Integration combining the Guinevere one-piece toilet bowl with the premium WASHLET S5 seat
  • CEFIONTECT® ceramic glaze prevents debris and mold from sticking to ceramic surfaces
  • High-efficiency TORNADO FLUSH® system delivers powerful and reliable rinsing performance at 1.28 GPF
  • Decorative skirted design features traditional architectural molding for a classic look that’s easier to clean
  • Concealed supply connection ensures bidet water hoses and power cords are completely hidden from view
  • EWATER+® and PREMIST® systems automatically mist the bowl and clean the bidet wand after every use
  • Front and rear warm water wash featuring fully adjustable temperature and water pressure settings
  • Comfortable heated seat with personal temperature controls
  • Warm air drying system with variable temperature settings to reduce paper use
  • Automatic air deodorizer activates during use to keep the bathroom air fresh
  • Chrome plated trip lever included on the tank (Premium finishes available via customization)
  • Comfortable universal height and ADA compliant design
  • Standard 12" rough-in installation

TOTO Guinevere Compatibility

The TOTO Guinevere WASHLET+ is an elongated front one-piece toilet system. Confirm these four things before ordering.

  • Rough-in measurement: Standard 12-inch rough-in configuration. Make sure to measure from the wall (not the baseboard) to the center of your floor drain bolts.
  • Floor space: Elongated bowl requires about 18½ inches from the wall to the front of the bowl for maximum seating comfort. Confirm at least 15 inches of side clearance from the bowl centerline.
  • Water supply location: Your incoming water line connects neatly behind the skirted base. Due to the fully skirted design, ensure your supply valve clearance matches skirted toilet dimensions to accommodate the concealed connection. Standard ½-inch shutoff valves work with this toilet.
  • Drain configuration: This toilet has a floor drain only. Wall drains are not compatible; the drain must exit the floor at your standard 12-inch rough-in point.

For reference: One-piece toilets are heavier than two-piece models (approximately 75–90 lbs) because the tank and bowl are fused together; plan for two people during installation.

Installation steps

  1. Turn off the water supply and flush the existing toilet to empty the tank and bowl.
  2. Disconnect the water supply line and remove the old toilet by unbolting it from the floor.
  3. Clean the floor around the drain opening and remove the old wax ring or seal.
  4. Install a new wax ring (or rubber seal) on the floor drain opening, centered on the drain.
  5. Lower the new toilet onto the wax ring, aligning the bolts with the floor holes, and tighten bolts hand-tight then with a wrench.
  6. Route the WASHLET+ water supply and electrical lines through the integrated porcelain channels to achieve a concealed installation.
  7. Reconnect the water supply line, plug in the unit, and fill the tank to test for leaks around the base and connection points.
  8. Secure the S5 bidet seat onto the bowl using the quick-release docking station and calibrate settings using the wireless remote control.

TOTO Guinevere WASHLET+ S5 One-Piece Downloads

TOTO Guinevere WASHLET+ S5 One-Piece Installation Manual

TOTO Guinevere WASHLET+ S5 One-Piece Spec Sheet

Frequently Asked Questions

  • Yes, the TOTO Guinevere is a highly regarded toilet known for its exceptional reliability, premium decorative look, and durable one-piece construction. Homeowners and professionals trust it because its large trapway and strong flush engine work together effectively to prevent clogs and ensure a dependable everyday bathroom routine.

  • The integrated WASHLET S5 seat brings a suite of premium luxury features to your bathroom, including a convenient slim wireless remote control with an illuminated touchpad, customized warm water washing, a heated seat, and an adjustable warm air dryer. It also includes an automatic air deodorizer to keep your space smelling fresh, and a quick-release docking station for effortless cleaning access.

  • The TOTO Guinevere features an efficient 1.28 GPF flow rate powered by a gravity-based TORNADO FLUSH® system. This decorative one-piece elongated, Universal Height toilet features a fully skirted classic design, a standard 12-inch rough-in, an ultra-smooth CEFIONTECT® glaze, and built-in channels for a concealed WASHLET®+ bidet installation.