

More delivery methods in checkout
Return this item within 7 days of purchase.
Get an immediate answer with AI
AI-generated from the text of manufacturer documentation. To verify or get additional information, please contact customer service.
If your Kohler toilet is acting up—running constantly, weak flushes, or just not sealing right—this genuine flush valve kit is probably what you need.
It's part number 1039861, and it's designed by Kohler engineers to match the original specs perfectly.
No guesswork, no weird fit issues.

What's nice about going genuine is the quality.
It's made with premium materials that hold up over time, so you're not replacing it again in six months.


Installation is straightforward if you're handy, and it covers the whole valve assembly.


4.7 out of 5