Toto St446ema12 Aquia Iv Dual Flush Toilet Tank 1.28 Gpf

Product Description

The TOTO st446ema#12 is a vitreous china toilet tank designed for the Aquia IV toilet system, delivering a dual-flush operation at 1.28 gpf for full flush and 0.9 gpf for reduced flush. The top-mounted push button activates the flush cycle without a side handle, keeping the tank profile clean and uncluttered. Finished in Sedona Beige, this tank pairs with compatible Aquia IV bowls and is built to accept WASHLET+ and auto-flush accessories, making it a practical starting point for a touch-free bathroom setup. It carries WaterSense labeling and meets ASME A112.19.2 and CSA B45.1 standards. Licensed plumbers and qualified installers handle this type of fixture replacement in residential bath applications.

The st446ema#12 is intended for residential bathroom installations where water conservation and long-term adaptability are priorities. The dual-flush system allows the user to select the appropriate volume per flush, reducing overall water consumption compared to single-flush designs. Its Sedona Beige finish suits both contemporary and traditional bath interiors. The tank ships with installation hardware and is designed for straightforward pairing with the matching Aquia IV bowl. IAPMO listing and EPA compliance confirm it meets widely adopted plumbing and efficiency standards, including California Energy Commission requirements for sale in CA.

Key Features

• Dual-flush operation: 1.28 gpf full flush and 0.9 gpf reduced flush for water-use control
• Top-mounted push button activation with no side handle hole required
• Vitreous china construction for a smooth, easy-to-clean surface
• WaterSense labeled and EPA compliant, including CEC compliance for California sale
• Compatible with WASHLET+ and auto-flush upgrades for touch-free operation
• Meets ASME A112.19.2 and CSA B45.1 standards; IAPMO listed

Compatibility

Designed for use with the CT446CUGT40 Elongated Toilet Bowl as part of the Aquia IV system. Supports WASHLET+ and auto-flush accessory integration.

Installation Notes

Installation should be performed by a licensed plumber or qualified installer in accordance with local plumbing codes and IPC guidelines. Shut off the water supply at the stop valve and flush the existing tank fully before beginning any tank swap. Verify bowl-to-tank bolt alignment and gasket seating before tightening; do not overtighten connections on vitreous china. Confirm supply line compatibility and check for leaks at the fill valve and flush valve connections before returning the fixture to service.

Technical Specifications

• Material: Vitreous China
• Flow Rate: 1.28 gpf (full flush); 0.9 gpf (reduced flush)
• Flush Type: Dual Flush
• Handle Type: Push Button, Top-Mounted
• Number of Holes: No Hole
• Length: 6.375 inches
• Color/Finish: Sedona Beige
• Application: Residential
• Style: Aquia IV
• Certifications: ASME A112.19.2, CSA B45.1, IAPMO Listed, WaterSense Labeled, EPA Compliant, CEC Compliant

Standard Information

• Brand: TOTO
• Manufacturer Part Number: st446ema#12