Kohler GP1059291 Piston Flush Valve Seal for Canister Class Five Toilets

Kohler GP1059291 Piston Flush Valve Seal — Class Five Canister Toilet

The Kohler GP1059291 is a genuine OEM piston flush valve seal designed specifically for Kohler Class Five canister-style toilets. When your toilet runs continuously, flushes weakly, or won’t stop after flushing, a worn piston seal is often the culprit. This direct replacement seal restores a watertight shutoff and brings your flush performance back to factory spec.

Key Features

• Genuine Kohler OEM replacement part — exact fit for Class Five canister toilets
• Replaces the piston flush valve seal inside the canister assembly
• Stops phantom flushing, running water, and weak flush performance
• Durable rubber construction for long-lasting seal integrity
• Easy DIY installation — no special tools required
• Restores full flush power and water efficiency

Why Replace Your Flush Valve Seal?

The piston flush valve seal is a wear item that degrades over time due to mineral deposits, chlorine, and normal use. A failing seal allows water to leak past the canister piston, causing your toilet to run constantly or flush incompletely. Replacing it with the genuine Kohler GP1059291 is a fast, affordable fix that avoids a costly service call.

Compatibility

Designed for Kohler Class Five canister-style toilets. Always verify your toilet model number before ordering to confirm compatibility with the GP1059291 seal.

Part Details

• Part Number: GP1059291
• Brand: Kohler
• Type: Piston Flush Valve Seal
• Application: Class Five Canister Toilets
• Weight: 0.2 lbs