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Kohler 1138648 — Review & Specs | Pricepect | Pricepect

Home Toilet FlappersKohler 1138648

Kohler 1138648 — image 1

Kohler

Kohler 1138648

$11.18

1138648Vikrell Swirl1 Count (Pack of 1)

Toilet Flappers

Expert Review Analysis

The Kohler Genuine Part 1138648 Flapper Assembly is an OEM replacement component designed for Kohler toilets, specifically compatible with two-piece models manufactured prior to 2004 that utilize a 2-inch flapper design. It controls water flow from the tank to the bowl and is constructed from durable, chemical-resistant materials to ensure optimal performance and warranty protection. This part is essential for routine maintenance and DIY repairs on compatible units like the San Raphael K-3722.

✓ Best for: Owners of Kohler two-piece toilets with 2-inch flappers, especially pre-2004 models like the San Raphael K-3722, who need an OEM replacement to maintain warranty and performance. It is ideal for routine maintenance where the flapper fails to seal or lift properly, and for DIY repairs paired with fill valve GP1138930.✗ Not ideal for: Owners of modern Kohler toilets manufactured after 2004, users of one-piece toilets requiring different flapper types, or those seeking a universal replacement part that fits non-Kohler brands. It is also not suitable for users who require verified long-term durability data from consumer reviews.

Pros

✓Genuine OEM part ensures warranty protection and precise fit for Kohler toilets
✓

Best Seller Rank History

Now#110Best#29Worst#27,651 -81

Lower = better sales rank

Rating Trend

Rating4.1/ 5Reviews25+13 reviews -0.11

Specifications

Design

Height58.4 mm mm

Width123.2 mm mm

Length99.1 mm mm

Weight9.1 g g

Flapper Size50.8 mm mm

Features

MaterialDurable, chemical-resistant

CompatibilityKohler two-piece toilets (pre-2004), San Raphael K-3722

Fill Valve CompatibilityGP1138930

FunctionControls water flow from tank to bowl

General

BrandKohler

ManufacturerKohler

Model1138648

ColorVikrell Swirl

ConditionNew

Compatibility

Compatible Fill ValveGP1138930

Compatible Model ExampleSan Raphael K-3722

Identification

Alternate Part NumberK-1138648

UPC Code885612357823

Dimensions & Weight

Height2.3 inches

Width4.85 inches

Depth3.9 inches

Research Sources

griggindustries.com

noelsplumbingsupply.com

easyplumbing.com

resources.kohler.com

gnkitchenandbath.com

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Kohler GP1078441 vs Kohler 1138648

User Reviews

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4.1

(12 reviews)

Durable construction resists wear from water and chemicals during operation

✓Compatible with common 2-inch flapper systems in older two-piece models

✓Meticulously designed by Kohler engineers for optimal flushing performance

✓Essential component for restoring reliable water flow control in toilets

Cons

✗Weight specifications conflict between sources indicating potential listing inconsistency
✗Limited to specific Kohler models and is not a universal replacement part
✗No user reviews available so real-world longevity is unverified
✗Installation ease and long-term durability cannot be verified by consumer feedback
✗Not suitable for modern toilets or those requiring flappers larger than 2 inches

From Expert Reviews

Praised by Experts

✓Meticulously designed by Kohler engineers for optimal flushing performance
✓Essential component for restoring reliable water flow control in toilets

Expert Opinion

No independent professional reviews, editorials, or expert analyses from recognized plumbing authorities or consumer reports are available in the source data. Retailers and Kohler's service pages describe the part positively as an essential component for reliable flushing and meticulously designed for performance, emphasizing its OEM quality.

What Users Say

There is a complete absence of consumer reviews, ratings, or testimonials in the available data. One listing explicitly notes zero customer reviews, making it impossible to identify common praise, complaints, or recurring themes from everyday users.

How It Compares

vs. Kohler GP83996

Advantages

✓1138648 is specifically designed for pre-2004 two-piece models while GP83996 suits older one-piece styles

Disadvantages

✗1138648 is limited to two-piece compatibility whereas GP83996 covers different Kohler styles

Choose the 1138648 for pre-2004 two-piece toilets and the GP83996 for older one-piece Kohler models.

vs. Universal 2-inch Flappers

Advantages

✓1138648 provides OEM warranty protection and precise fit unlike generic universal options

Disadvantages

✗1138648 is model-specific and not compatible with non-Kohler toilets unlike universal flappers

Choose the 1138648 for Kohler toilets to ensure warranty compliance and durability, and universal flappers for budget repairs on non-Kohler units.

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