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Kohler GP1078441 — Review & Specs | Pricepect | Pricepect

Home Toilet FlappersKohler GP1078441

Kohler GP1078441 — image 1

Kohler

Kohler GP1078441

$6.71$12.2545% off

GP1078441Red3-1/4 In. Warranty

Toilet Flappers

Expert Review Analysis

The Kohler GP1078441 is a genuine OEM replacement flapper designed specifically for Kohler two-piece toilets featuring Class Five flushing technology. It features a 3.25-inch durable rubber seal that ensures a precise fit to prevent phantom flushes and maintain high-efficiency water performance. This part is essential for restoring full flush power and reliability in compatible Kohler models like Memoirs and Cimarron.

✓ Best for: Kohler two-piece toilet owners with Class Five models such as Memoirs, Cimarron, Devonshire, and Bancroft. It is ideal for DIY homeowners needing to replace worn flappers causing leaks or weak flushes, and for rental property managers standardizing repairs on Kohler fixtures.✗ Not ideal for: Owners of one-piece toilets, users requiring a universal fit for non-Kohler brands, or those with pre-2010 Kohler models that require older flapper types like the GP51862.

Pros

✓Provides exact OEM fit for listed Kohler Class Five two-piece toilet models
✓Durable rubber construction resists chemical wear and corrosion effectively
✓

Best Seller Rank History

Now#22Best#22Worst#92 +47

Lower = better sales rank

Rating Trend

Rating4.5/ 5Reviews2,311+91 reviews

Specifications

Features

TechnologyClass Five

Flush Efficiency1.28 GPF

Chain IncludedYes

ADA CompliantNo

WaterSense LabeledNo

General

BrandKohler

ModelGP1078441

TypeToilet flapper (flush valve seal)

ColorRed

MaterialDurable rubber

Compatibility

Class Five TechnologyDesigned specifically for Kohler Class Five flushing systems

Material

Chemical ResistanceDurable rubber resistant to chemicals and corrosion

Warranty

Limited Warranty1-year limited warranty coverage

Dimensions & Weight

Height2.7 inches

Width5.0 inches

Depth7.5 inches

Weight0.0949999224278488 pounds

Research Sources

shopkohlernj.com

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User Reviews

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4.5

(2,261 reviews)

Restores full flush power and eliminates leaks in compatible toilets

✓Easy DIY installation process requiring no specialized tools or expertise

✓Prevents phantom flushes through a precise 3.25-inch seal design

✓Maintains Class Five high-efficiency flushing performance standards

Cons

✗Not a universal fit and incompatible with non-Kohler or non-Class Five toilets
✗Chain length may require adjustment to prevent tangling issues
✗Rubber material degrades faster in areas with hard or mineral-rich water
✗Limited compatibility restricts use to specific Kohler two-piece models only
✗May wear out within one to two years in high-mineral water environments

From Expert Reviews

Praised by Experts

✓Praised as the go-to OEM replacement for Class Five systems by plumbing experts
✓Precise 3.25-inch seal effectively prevents phantom flushes and leaks
✓Durable rubber construction offers superior corrosion resistance for longevity
✓Essential for maintaining the intended Class Five technology performance

From User Reviews

Users Love

✓Perfect fit for specific Kohler models restores original flush efficiency
✓Eliminates running toilet issues and provides a reliable seal
✓Quick installation process takes only a few minutes to complete
✓Lasts up to two years even in hard water conditions for many users

Users Complain About

✗Chain length is often too short or long requiring manual adjustment
✗Flapper wears out faster than expected in mineral-rich water supplies
✗Purchase is overkill or incompatible if not for the exact required model
✗Does not fit generic or non-Kohler toilet tanks despite some hopes

Expert Opinion

Plumbing experts and editors from sites like Ferguson and CPE Supply highly recommend this part as the definitive OEM replacement for Class Five systems. They highlight its precise 3.25-inch seal as critical for preventing phantom flushes and its durable rubber construction for resisting corrosion. Kohler's official positioning emphasizes its necessity for maintaining the specific high-efficiency performance of their Class Five technology.

What Users Say

Everyday consumers generally report high satisfaction, with many noting that the flapper perfectly fits their Kohler models and restores the toilet to like-new flushing performance. Common praise includes the ease of installation and the elimination of running toilet noises. However, recurring complaints focus on the chain length requiring adjustment and the rubber degrading more quickly than expected in homes with hard water.

Common Complaints

Users frequently report that the included chain is either too short or too long, necessitating adjustment to prevent tangling. Additionally, some customers in areas with hard water note that the rubber flapper wears out faster than generic alternatives, requiring replacement every 12 to 18 months.

What People Are Saying

“Perfect fit for my Kohler Cimarron—flush like new!”
5/5 ★Home Depot ReviewNov 2025

“No more running toilet; lasted 2 years in hard water”
5/5 ★Home Depot ReviewNov 2025

“Installed in 2 minutes, chain included.”
5/5 ★Home Depot ReviewNov 2025

“Chain too short/long for some tanks—had to adjust”
3/5 ★Home Depot Q&ANov 2025

“Wears out faster than expected in mineral-rich water”
3/5 ★Home Depot ReviewNov 2025

How It Compares

vs. Fluidmaster 502

Advantages

✓Kohler GP1078441 offers exact OEM fit for Class Five systems preventing leaks

Disadvantages

✗Fluidmaster 502 provides universal adjustability for any toilet type

Choose Kohler GP1078441 for guaranteed Class Five performance; choose Fluidmaster 502 for broader compatibility.

vs. Korky 100BP

Advantages

✓Kohler GP1078441 provides superior precision fit and OEM reliability

Disadvantages

✗Korky 100BP is a budget-friendly option for generic repairs

Choose Kohler GP1078441 for reliability; choose Korky 100BP for cost-effective generic fixes.

vs. Kohler GP51862

Advantages

✓Kohler GP1078441 is designed for modern Class Five technology

Disadvantages

✗Kohler GP51862 is compatible with older pre-2010 Kohler two-piece models

Choose Kohler GP1078441 for modern Class Five toilets; choose GP51862 for legacy Kohler models.

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