---
product_id: 74355234
title: "Kohler GP83996 4.06-Inch by 2.56-Inch ID Flush Valve Gasket"
price: "€ 11.64"
currency: EUR
in_stock: false
reviews_count: 8
url: https://www.desertcart.pt/products/74355234-kohler-gp83996-4-06-inch-by-2-56-inch-id
store_origin: PT
region: Portugal
---

# Genuine Kohler OEM quality Rigid straight-edge design Precision 4.06" x 2.56" fit Kohler GP83996 4.06-Inch by 2.56-Inch ID Flush Valve Gasket

**Price:** € 11.64
**Availability:** ❌ Out of Stock

## Summary

> 🚽 Seal the deal with Kohler’s flawless flush gasket!

## Quick Answers

- **What is this?** Kohler GP83996 4.06-Inch by 2.56-Inch ID Flush Valve Gasket
- **How much does it cost?** € 11.64 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/74355234-kohler-gp83996-4-06-inch-by-2-56-inch-id)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect OEM Fit:** Specifically engineered for Kohler one-piece toilets—no guesswork, no leaks.
- • **Leak-Free Confidence:** Join 400+ users who rated 4.6 stars for reliable, drip-free performance.
- • **Easy Pro Installation:** Freeze-and-fit trick guarantees smooth gasket placement—no plumber needed.
- • **Durable Seal Integrity:** Rigid edges ensure a tight, long-lasting flush valve seal every time.
- • **Trusted Kohler Quality:** Official genuine part means superior rubber material and flawless compatibility.

## Overview

The Kohler GP83996 is a genuine OEM flush valve gasket designed for one-piece Kohler toilets, measuring 4.06 by 2.56 inches. Its rigid straight-edge design ensures a secure, leak-proof seal with canister valves. Trusted by hundreds of users for easy installation and durable performance, this gasket guarantees a perfect fit and long-lasting reliability—avoid third-party failures and upgrade to official Kohler quality.

## Description

Kohler GP83996 Gasket

Review: Worked great and no leaks - Simple replacement for a gasket which was dissolving. Easy fix. Worked great and no leaks
Review: Use this official Kohler gasket, not a third party gasket. - I bought multiple third-party gasket and couldn't get them installed. What I found with off-brand gaskets is that the rubber material is quite different from that used by Kohler. It was so difficult to compress that I couldn't install the flush valve assembly. The hack to getting even the Kohler gasket installed is to compress-and-freeze the gasket, place it on the valve assembly, and, before it can thaw and expand, insert the gasket and rotate the assembly into place. That trick doesn't work with third party gaskets I tried. It worked perfectly with the official Kohler gasket.

## Features

- Replacement flush valve gasket for various one-piece Kohler toilets
- 2" gasket seals flush valve to the tank
- Gasket has straight, rigid edges
- Use with canister valves
- Kohler GENUINE Part
- Not a universal fit
- KO.83996 is Kohler part number

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 4.6 out of 5 stars 409 Reviews |

## Product Details

- **Brand:** KOHLER
- **Color:** Unfinished
- **Shape:** Rectangular
- **UPC:** 885612376343
- **Manufacturer:** KOHLER

## Images

![Kohler GP83996 4.06-Inch by 2.56-Inch ID Flush Valve Gasket - Image 1](https://m.media-amazon.com/images/I/711a5bc0e4L.jpg)
![Kohler GP83996 4.06-Inch by 2.56-Inch ID Flush Valve Gasket - Image 2](https://m.media-amazon.com/images/I/71KygOLHL1L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked great and no leaks
*by R***F on September 17, 2025*

Simple replacement for a gasket which was dissolving. Easy fix. Worked great and no leaks

### ⭐⭐⭐⭐⭐ Use this official Kohler gasket, not a third party gasket.
*by T***D on July 26, 2025*

I bought multiple third-party gasket and couldn't get them installed. What I found with off-brand gaskets is that the rubber material is quite different from that used by Kohler. It was so difficult to compress that I couldn't install the flush valve assembly. The hack to getting even the Kohler gasket installed is to compress-and-freeze the gasket, place it on the valve assembly, and, before it can thaw and expand, insert the gasket and rotate the assembly into place. That trick doesn't work with third party gaskets I tried. It worked perfectly with the official Kohler gasket.

### ⭐⭐⭐⭐⭐ Fits with a little heat and persuasion
*by P***H on October 30, 2024*

It feels like the most midlife thing to do: a review for a toilet tank gasket! Anyway, I have a Santa Rosa one-piece toilet and the gasket was disintegrating from using cleaners in the tank itself (bad idea). This gasket fits if you put it in hot water for 5 minutes before installing it. Needs a good bit of strength for the flange to clip back onto the bottom of the tank but it works. Sure beats calling a plumber for $150!

## Frequently Bought Together

- Kohler GP83996 4.06-Inch by 2.56-Inch ID Flush Valve Gasket
- KOHLER GENUINE PART GP1039444 FLAPPER FOR ONE-PIECE TOILETS WITH CLASS FIVE TECHNOLOGY

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-01-25*