Gerber 28990WH Maxwell Toilet Tank 1.28 Gpf White

Product Description

The GERBER 28990WH is a replacement toilet tank designed for the Maxwell two-piece toilet line. It operates at 1.28 gallons per flush (GPF), meeting WaterSense efficiency standards. The tank is finished in White and is built for a 12-inch rough-in configuration. Front jet flushing action delivers a consistent, reliable flush cycle. This tank is intended for residential bathroom installations and is typically installed or replaced by a licensed plumber or experienced trades professional.

The 28990WH tank is part of the GERBER Maxwell toilet series. The Maxwell line is built around a 16-3/8-inch ADA-compliant ErgoHeight bowl design, making it a common specification in accessible residential bathroom builds and remodels. The 12-inch rough-in dimension covers the most common toilet placement in residential construction. This tank pairs with the corresponding Maxwell bowl to complete the two-piece toilet assembly.

Key Features

• 1.28 GPF (4.8 Lpf) flush rate meets WaterSense low-consumption standards
• Front jet flushing action for consistent bowl coverage
• Designed for 12-inch rough-in installations
• White finish for standard residential bathroom applications
• Compatible with ADA ErgoHeight Maxwell toilet system at 16-3/8 inches bowl height

Compatibility

Designed for use with the GERBER Maxwell two-piece toilet series. Intended for 12-inch rough-in configurations. Pairs with the Maxwell bowl to complete a 1.28 GPF ADA ErgoHeight toilet assembly.

Installation Notes

Installation of this toilet tank should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and flush the existing tank to drain before beginning any tank removal or replacement work. Use care when tightening tank bolts to avoid cracking the porcelain. Inspect the spud washer, fill valve, and flapper during installation and replace any worn components before completing the job.

Technical Specifications

• Flush Rate: 1.28 GPF (4.8 Lpf)
• Rough-In: 12 inches
• Bowl Height (System): 16-3/8 inches ADA ErgoHeight
• Color/Finish: White
• UPC: 671052049233

Standard Information

• Brand: GERBER
• Manufacturer Part Number: 28990WH