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TOTO Ultramax One-Piece Round Bowl Toilet - 1.6 GPF - White toilet on a white background

TOTO Ultramax One-Piece Round Bowl Toilet - 1.6 GPF

by TOTO
SKU MS603113CSFG#01
UPC/GTIN: 739268482708
$523.00
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TOTO Ultramax One-Piece

  • Tornado Flush: Centrifugal, cyclonic rinsing action utilizes two powerful nozzles to clear the bowl efficiently at a classic 1.6 GPF volume
  • CEFIONTECT Glaze: Smooth ceramic finish minimizes surface friction to keep waste from adhering and simplify maintenance
  • SoftClose Seat: Premium round front seat lowers itself silently without slamming (SS113 model included)
  • Universal Height: Posture-friendly seating height mimics a standard chair to provide comfort for users of all mobilities
  • One-Piece Design: Seamless single-unit construction eliminates the gap between tank and bowl for easier external wipe-downs
  • WASHLET+ Compatible: Engineered with integrated internal pathways to seamlessly accommodate a water-wash bidet upgrade with hidden lines
  • ADA Compliant: Serves people of every age and capability, optimizing the bathroom experience for accessibility
TOTO Ultramax One-Piece Round Bowl Toilet - White toilet on a white background
TOTO Ultramax One-Piece Round Bowl Toilet - 1.6 GPF - side view

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 Ultramax One-Piece Round Bowl Toilet - 1.6 GPF - top view

Powerful Tornado Flush

The TORNADO FLUSH system utilizes two powerful nozzles to create a centrifugal, cyclonic rinsing action with a 1.6 GPF volume. It delivers a strong and efficient clean with every flush, sweeping away waste efficiently. Found in many Toto Ultramax models.

TOTO Ultramax One-Piece Round Bowl Toilet - 1.6 GPF - Front view

Smooth Trapway Design

The internal trapway is fully glazed to match the smooth texture of the bowl, allowing waste to flow smoothly without catching on rough ceramic areas. This internal design works in harmony with the flush engine to maximize performance.

TOTO Ultramax One-Piece Round Bowl Toilet - 1.6 GPF - White toilet on a white background

Comfort and Convenience

Universal height, a compact round bowl, and the included SoftClose seat make it comfortable and easy to use every day while meeting accessibility standards for smaller layouts.

TOTO Ultramax One-Piece (1.6 GPF, Round Bowl)

The TOTO Ultramax One-Piece is a trusted classic updated to meet modern expectations for comfort, cleanliness, and performance. It features a decorative high-profile tank with a substantial, furniture-like presence, paired with a compact round front bowl that optimizes space in smaller bathrooms. Equipped with a powerful 1.6 GPF TORNADO FLUSH® system and a smooth CEFIONTECT® ceramic glaze, it ensures consistent rinsing results while maintaining a premium everyday bathroom experience.

Perfect for those looking for a high-performance, low-maintenance toilet with a classic 1.6 GPF flush volume and space-saving round profile.

TOTO Ultramax Round Bowl Specifications and Features

  • CEFIONTECT® ceramic glaze prevents debris and mold from sticking to ceramic surfaces
  • Powerful TORNADO FLUSH® system for consistent and reliable rinsing
  • Specially designed to accommodate WASHLET®+
  • Decorative one-piece design with high-profile tank
  • Comfortable universal height
  • Round front bowl with included SoftClose® seat (SS113)
  • Chrome plated trip lever included (with optional upgrade finishes available)
  • 12" rough-in installation

TOTO Ultramax One-Piece Compatibility

The TOTO Ultramax is a round front one-piece toilet. Confirm these four things before ordering.

  • Rough-in measurement: Standard 12-inch rough-in configuration.
  • Floor space: Round bowl requires less depth from the wall to the front of the bowl compared to elongated designs, saving valuable floor space. Confirm at least 15 inches of side clearance from the bowl centerline.
  • Water supply location: Your incoming water line should connect to the left or right side of the base. 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 12-inch rough-in point.

For reference: One-piece toilets are heavier than two-piece models (approximately 75 lbs); 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. Reconnect the water supply line, turn on the water, and fill the tank to test for leaks around the base and connection points.
  7. Install the included SoftClose seat onto the bowl mounting holes and adjust as needed.

TOTO Ultramax Round One-Piece Downloads

TOTO Ultramax Round One-Piece Installation Manual

TOTO Ultramax Round One-Piece Spec Sheet

Frequently Asked Questions

  • Yes! The Toto UltraMax is a good toilet. It flushes powerfully, uses less water, and has a smooth design that’s easy to clean.


  • A round front bowl is shorter from back to front, extending less into the bathroom than an elongated model. This makes it an excellent choice for compact bathrooms, powder rooms, or layouts where door clearance and floor space are limited.

  • Yes. The TOTO UltraMax features the TORNADO FLUSH® system, which uses two powerful nozzles to create a swirling, cyclonic whirlpool that cleans the entire bowl efficiently.


  • The TOTO Ultramax is a one-piece toilet known for its powerful flush, smooth design, and easy cleaning. It’s a popular choice for everyday use.


  • The benefits of Ultramax are its strong flushing, easy-to-clean one-piece design, and reliable performance. It’s simple, durable, and low maintenance.