Kohler Flapper GP1079948 | Noels Pumbing Supply

“Kohler K-GP1138930 Silent Fill Toilet Valve Kit” has been added to your cart. View cart

Red rubber flapper with yellow foam float and stainless chain.

WHAT OUR CUSTOMERS SAY…

“This place is amazing. I live in San Antonio, Texas and there are a few plumbing stores with vintage parts but they never have what I need and the ordering process takes them weeks. I found a rare part at Noels by reverse image search but they will do it for you. I've used them 3 times. Their agents are knowledgable and polite. They will find you the same part or the after market part and get you going on your way. They have 2-3 day shipping. My house was built in the 30's and they know exactly what the after market parts are that I need. I save money and time going to them. I sure wish they were in San Antonio! I will just go directly to Noel's next time - they are LEGENDS! ”

-BP W.

06/21/2026

$15.27

The Kohler GP1105825 is a genuine replacement flapper and float kit designed specifically for 1.28 gallons per flush (GPF) toilets. It is primarily compatible with Sterling and select Kohler Windham two-piece toilet models.

We can ship anywhere the US Postal Service ships. For orders being shipped outside the US, please contact us at (888) ASK-NOEL, noelsplumbingsupply@fuse.net, or via the text widget on this screen.

SKU: 54825 Category: Toilet Flappers Tags: Kohler, Sterling

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The Kohler GP1105825 is a genuine replacement flapper and float kit designed primarily for Sterling 1.28 gallons per flush (GPF) toilets. This red, 2-inch rubber flapper is engineered to fix common issues like “ghost flushing,” intermittent leaks, or continuous running by restoring a reliable seal against the flush valve.

GP1105825