Toto CST646CEMFGAT4001 One-piece Elongated Toilet 1.28 Gpf

Product Description

The TOTO CST646CEMFGAT40#01 is a one-piece ultra high-efficiency elongated toilet designed for residential and light commercial plumbing installations. It flushes at 1.28 gallons per flush (gpf), qualifying as a high-efficiency toilet (HET) under WaterSense guidelines. The elongated bowl sits at a 16.125-inch rim height, making it a comfort-height fixture. The toilet features CEFIONTECT ceramic glaze, a smooth ion-barrier surface applied to the vitreous china that reduces waste adhesion and simplifies cleaning. It is finished in Cotton White and is manufactured domestically. Licensed plumbers handle installation in new construction and remodel applications alike.

This toilet is suited for residential bathrooms and commercial restrooms where water conservation and hygiene maintenance are priorities. The 12-inch rough-in measurement matches the most common rough-in dimension found in North American construction, making it a straightforward drop-in replacement for standard toilet setups. The Aqua IV flushing system delivers a consistent, quiet flush. The one-piece construction eliminates the tank-to-bowl gasket and hardware, reducing potential leak points compared to two-piece units.

Key Features

• 1.28 gpf flush rate meets WaterSense high-efficiency toilet standards
• CEFIONTECT ceramic glaze reduces waste adhesion for easier cleaning
• Elongated bowl with 16.125-inch rim height for comfort-height seating
• One-piece construction eliminates tank-to-bowl connection leak points
• 12-inch rough-in fits standard North American plumbing layouts
• Cotton White finish for broad fixture coordination

Compatibility

Designed as an OEM-style one-piece elongated toilet for standard 12-inch rough-in residential and commercial plumbing installations.

Installation Notes

Installation is performed by a licensed plumber per local plumbing code and IPC requirements. Shut off the water supply and fully drain the existing toilet before removal. Set the wax ring or wax-free seal on the floor flange before setting the toilet, and verify the flange height relative to the finished floor before committing to a seal type. Do not overtighten closet bolts, as vitreous china can crack under excess torque.

Technical Specifications

• Flush Rate: 1.28 gpf
• Bowl Shape: Elongated
• Rim Height: 16.125 inches
• Rough-In: 12 inches
• Configuration: One-Piece
• Color: Cotton White
• Origin: Domestic

Standard Information

• Brand: TOTO
• Manufacturer Part Number: CST646CEMFGAT40#01