Gerber 28-790 Toilet Tank Baffle 1.6 Gpf for Flapper 99-647

Product Description

The GERBER 28-790 is a genuine OEM toilet tank baffle designed for 1.6 GPF flush systems. The baffle measures 2 inches in diameter and is engineered to work in conjunction with the Gerber 99-647 flapper. It fits inside the 28-790, 28-794, and 28-795 tank models and is a direct manufacturer-sourced replacement component. Licensed plumbers and journeymen plumbers handling toilet rebuild or repair work on Gerber tank systems will encounter this part when restoring proper flush volume and seal performance. The baffle controls water flow dynamics within the tank, ensuring the flapper seats and releases correctly on each flush cycle.

This baffle is intended for residential toilet tank applications where the existing baffle has deteriorated, warped, or otherwise compromised flush performance. It is sized and calibrated for 1.6 GPF low-consumption flush systems, making it appropriate for both renovation and routine maintenance work on Gerber toilets equipped with the 28-790, 28-794, or 28-795 tank. It is a direct drop-in replacement that requires no modification to the tank assembly.

Key Features

• Genuine OEM Gerber replacement part — not an aftermarket substitute
• Rated for 1.6 GPF low-consumption flush systems
• 2 inch diameter sizing matched to the 99-647 flapper assembly
• Compatible with 28-790, 28-794, and 28-795 Gerber tank models
• Direct drop-in fit requiring no tank modification

Compatibility

Designed for use with the Gerber 99-647 flapper in Gerber toilet tanks identified as 28-790, 28-794, and 28-795. Alternate part number G0099557 references the same component.

Installation Notes

Installation is performed by a licensed plumber during toilet tank service or rebuild. Shut off the water supply at the stop valve and flush the tank fully before beginning disassembly. Remove the tank lid and drain remaining water before extracting the old baffle. Follow all applicable IPC guidelines for toilet repair in the jurisdiction of the installation.

Technical Specifications

• Flush Rating: 1.6 GPF
• Diameter: 2 inches
• Alternate Part Number: G0099557
• Compatible Flapper: 99-647
• Compatible Tank Models: 28-790, 28-794, 28-795

Standard Information

• Brand: GERBER
• Manufacturer Part Number: 28-790