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1.5-in Plastic Flush valve for GP1059291

Ratings & Reviews for KOHLER 1.5-in Plastic Flush valve for GP1059291

4.8
241
Review
 4.8 out of 5
241 Reviews


96% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The product appears to be a reliable and easy-to-install solution that effectively resolves common toilet flushing issues. Customers report the repair kit was simple to use, required minimal tools, and fixed their toilet problems quickly and efficiently. Many noted the replacement part was a direct fit and the instructions were clear. Reviewers appreciated the availability of the specific part, which saved them from having to purchase an entire new flushing mechanism. Overall, the product is considered a high-quality, cost-effective solution for restoring proper toilet function.

Customer review summary generated by AI, including incentivized reviews.
241 Customer Reviews

Fits perfectly

Easy to install.

May 10, 2026
Verified Purchaser
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Universal Kohler part.

Would Recommend

Replaced the old, perfectly!

May 4, 2026
Verified Purchaser
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Ask the Lowe’s reps for suggestions

Would Recommend

It worked

April 16, 2026
Verified Purchaser
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Canister Repaired Quickly

Much needed canister was required because the nob at the bottom broke off. The part was a bit more expensive than I anticipated but it did come in a timely manner (3-4 days) and installed fairly easily after loosening the calcium buildup. The instructions were crucial to making the repair.

April 5, 2026

From kohler.com

Original Kohler parts

Perfect fit simple, easy replacement

March 4, 2026
Verified Purchaser
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Perfect Fix !

Would Recommend

This was actually the part I needed to fix the broken flush value on my Kohler toilet.

March 1, 2026
Verified Purchaser
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Okydoky

Would Recommend

Just what i needed

February 20, 2026
Verified Purchaser
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Easy replacement

Would Recommend

Aqua piston for kosher flush valve broke, was easy to replace with YouTube (less than 3 minutes). Inexpensive.

February 19, 2026
Verified Purchaser
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Be wary of tubing sizes.

I bought this to replace the original black one that broke on us last week. All of the parts fit; however, the tubing that fills the tank DOESN'T fit over the yellow tab, it's too small. So now I have to figure out how to change out the tubing or replace yet another part. Overall quality parts, but poor compatibility with original parts.

February 1, 2026
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Response from Kohler Product Expert

Hello alltheseoldhouses, this is Paige with Kohler Co. I am sorry to hear that this service part was not compatible with your toilet. We would be hap...

Kohler Product ExpertFebruary 4, 2026

Kohler-Lowes

Expeditious

Would Recommend

Excellent

January 7, 2026
Verified Purchaser
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Almost 5 star

But unfortunately the male tube connection at the top was too large to allow the exiating tube to connect to it. The original canister had a female fitting to recieve the rubber tube.

January 4, 2026

From kohler.com

Response from Customer Service

Dear Mikey, this is Sarah with Kohler Co. Thank you for your feedback regarding the Canister Repair Kit. We sincerely apologize for the inconvenience ...

Customer ServiceJanuary 4, 2026

repair

Would Recommend

it was what I needed for repair

December 29, 2025
Verified Purchaser
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It's a flimsy part - be careful installing and handling!

I was installing my toilet and the original canister in the new toilet easily snapped at the bottom stem. I did not realize how flimsy this part was until I broke it. It did not take much to break.

December 26, 2025

From kohler.com

Response from Jessica P.

JJH, my name is Jessica with Kohler Co. I am sorry to hear the flush valve in your toilet broke during the installation of the toilet. As the manufact...

Jessica P.December 26, 2025

replacing flush valve

Would Not Recommend

it wasn't broken

November 26, 2025
Verified Purchaser
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It works

Would Recommend

Exactly what I needed

November 13, 2025
Verified Purchaser
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