Gerber 28-990, Toilet Tank, Left-Hand Trip Lever, Metal Lever, White Tank, 1.28 gpf, Maxwell Series

Gerber G0028990 Maxwell Toilet Tank – 1.28 GPF Vitreous China Top-Mount Tank

The Gerber Maxwell G0028990 Toilet Tank is engineered for efficient water usage and long-lasting reliability in residential and light commercial installations. Designed for use with Gerber Maxwell series bowls (models 21-902, 21-912, and 21-918), this tank features a 3-inch flush valve and a 1.28 gallon-per-flush (GPF) rating to support high-efficiency performance.

Constructed from vitreous china with a glazed interior, the tank is built for durability and consistent flushing operation. Its top-mount trip lever and standard 12-inch rough-in configuration ensure compatibility with most standard installations in new construction and retrofit applications.

Key Product Details

• Flush Volume: 1.28 gallons per flush (High-Efficiency Toilet)
• Valve Type: 3" flush valve for effective waste removal
• Trip Lever: Chrome-plated, top-mounted
• Material: Vitreous china
• Finish: White
• Compatible Bowls: Designed for use with Gerber Maxwell 21-902, 21-912, and 21-918

Dimensions

• Width: 17-1/2 inches
• Depth (Front to Back): 8-3/8 inches
• Rough-In: 12 inches

Installation Considerations

This tank is suitable for two-piece toilet configurations and is supplied with a 3-inch flush valve pre-installed. Installation should follow standard plumbing practices, with proper gasket and bolt alignment to ensure a secure connection to the bowl. Always confirm compatibility with the intended bowl model prior to installation.

Application Notes

Ideal for both residential remodels and new build environments, the G0028990 offers water efficiency without compromising flush power. The tank’s standardized dimensions and mounting configuration make it a practical solution for professionals needing a reliable, code-compliant fixture component.