House Parts 98923 Lowes AquaSource Original Flapper
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Professional plumber repairing a toilet to install a 98923 Lowes AquaSource Original Flapper.
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98923 Lowes AquaSource Original Flapper

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98923 Lowes AquaSource Original Flapper

Key Features

  • Designed for 1.28 GPF (gallons per flush) toilets
  • Fits standard 3-inch flush valve openings
  • Durable hard plastic frame with a flexible silicone seal
  • Includes stainless steel chain and hook
  • Direct replacement for specified original equipment parts

Replaces / Cross-Reference Part Numbers

  • Lowe's AquaSource: 98923
  • Gerber: 99-788
  • Korky: 3060BP, 3070BP
  • Fluidmaster: 5403

Compatibility & Fitment

  • Fits specific Lowe's AquaSource 2-piece toilet models
  • Compatible with toilets requiring a 3-inch flapper
  • Confirm fitment by matching your existing part number to the cross-reference list

When to Replace

  • Toilet runs constantly or intermittently refills ("ghost flushing")
  • Water leaks from the tank into the bowl
  • Reduced or incomplete flush power
  • Visible signs of wear, warping, or deterioration on the existing flapper

Installation Tips

  • Turn off the water supply valve and flush to empty the tank.
  • Remove the old flapper by unhooking its chain and detaching it from the overflow tube posts.
  • Install the new flapper by clipping it onto the flush valve posts.
  • Attach the chain to the flush lever arm, leaving 1-2 links of slack.
  • Turn the water supply back on and check for a proper seal and flush cycle.
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Item Package Dimensions L x W x H
‎4.84 x 3.78 x 2.64 inches
Package Weight
‎0.07 Kilograms
Model Name
‎98923
Color
‎As Pictured
Material
‎Rubber
Number of Items
‎1
Part Number
‎98923 Lowe's AquaSource
Included Components
‎1 x 98923 Lowe's AquaSource Flapper

FAQ

This flapper is designed for 1.28 GPF single-flush toilets, including AquaSource models 98923, 12293, 312795, 352027, and 395280. It is also compatible with specific AquaSource toilet lines such as Henshaw, Colby, Lyndsay, and Rutherford, as well as Gerber model 99-788.
The most common signs are a toilet that runs continuously, phantom flushing (where the tank refills on its own without being used), or a handle that feels loose or requires jiggling to stop the water flow. If you notice these symptoms, the flapper seal has likely degraded and is no longer holding a watertight seal against the flush valve.
No tools are required for installation. You can replace the flapper by simply turning off the water supply, flushing the toilet to drain the tank, and unhooking the old flapper from the flush valve ears and chain. The new unit snaps directly into place.
Before installing the new part, inspect the flush valve seat at the bottom of the tank. If there is mineral buildup, calcium deposits, or rough edges on the seat, wipe it clean with a soft cloth or a non-abrasive pad. A clean, smooth surface is essential for the new flapper to create a proper seal and prevent future leaks.
The replacement process is straightforward and generally takes less than 5 to 10 minutes to complete.