Best Toilet Flush Valves (2026 Guide)
Selections are based on aggregated customer ratings, review volume, documented features (valve type, outlet size, adjustability), and brand compatibility
The Verdict
- Best Overall: Kohler 1117210 Flush Valve Kit 1.28 — Replacement valve kit: reliable Kohler-compatible option for standard 1.28 GPF systems and straightforward swaps
- Best Value: Kohler 2" Toilet Canister Flush Valve Kit 1188999 — Canister valve kit: 2-inch canister design suited for toilets requiring a larger outlet and robust flush action
This guide catalogs top-rated toilet flush valves selected for performance, compatibility, and reviewer volume to help pros and DIYers find reliable replacement parts. Picks were chosen by aggregating user ratings, review counts, and product features like valve type, outlet size, and adjustability
Top Picks
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1
Best Overall Kohler 1117210 Flush Valve Kit 1.28
Replacement valve kit: reliable Kohler-compatible option for standard 1.28 GPF systems and straightforward swaps
Kohler flush valve kit for toilet flush valves. Key benefit: reliable replacement part with easy installation. Customer insight: some users report quick installation and good fit, while durability and leakage reliability vary
- genuine Kohler part
- easy installation
- fits Kohler toilets
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2
Best Value Kohler 2" Toilet Canister Flush Valve Kit 1188999
Canister valve kit: 2-inch canister design suited for toilets requiring a larger outlet and robust flush action
Kohler canister flush valve kit for compatible Cimarron tanks. Provides OEM-like fit for the Kohler flush valve and can improve flush performance. One customer notes easy installation and good value
- OEM-compatible fit
- easy installation
- flush performance improvement
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3
R&T 3-Inch Dual Flush Valve with Top Push Button
Dual-flush valve: three-inch outlet with top push button for users wanting dual-flush water savings and easy actuation
Dual flush valve repair kit for 2-piece toilets, featuring a 3-inch outlet and top push button for adjustable water levels. Customers note easy installation and adjustable overflow tube for different tank heights
- 3-inch drain outlet compatibility
- top push button dual flush operation
- adjustable overflow tube and water level
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4
TOTO adjustable replacement fill valve assembly
Adjustable fill valve: Toto-compatible fill assembly offering height and fill adjustments for precise tank control
Adjustable fill valve compatible with TOTO toilet tanks. Aims to restore optimal tank performance with included components for easy setup. One customer notes quick replacement and good fit with Toto toilets
- adjustable for all TOTO tanks
- includes complete installation components
- restore optimal tank performance
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5
Kohler Toilet Flush Valve Kit 87998 for Kohler tanks
Tank-specific kit: genuine Kohler replacement crafted for direct fit in matching Kohler tanks and simple installation
Kohler genuine flush valve kit designed for Kohler toilet tanks. Not a universal fit; includes compatibility with Santa Rosa 3323/3803 models. Customer insight notes mixed installation ease and potential leakage
- genuine part for Kohler tanks
- compatibility with Santa Rosa 3323/3803
- corrosion resistant
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6
Kohler Genuine 1039861 Flush Valve Kit
Genuine flush valve: Kohler OEM-style valve designed for direct replacement and strong component compatibility
A replacement flush valve kit designed for Kohler toilets. Engineered for longevity with premium materials. Customers note good fit and quality, with mixed installation experiences
- genuine Kohler part
- premium materials
- engineered longevity
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7
Korky Toto Universal Toilet Fill Valve Replacement Kit
Universal fill kit: Korky-made Toto-compatible fill valve intended for broad fit across many toilet models
Universal toilet fill valve kit compatible with TOTO TSU99A.X and other Toto models. Includes fill valve, hardware, and adjustable height (8.5" to 14"). One customer notes easy install and a quiet operation
- adjustable height 8.5"–14"
- includes hardware
- fits TOTO TSU99A.X and other Toto fill valves
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8
Toilet flush valve kit with 3 1/4" flapper
Flapper kit: Kohler valve with a 3 1/4" flapper for toilets that require larger flapper sealing surfaces
Toilet flush valve kit from Kohler with a 3 1/4" flapper. Complete flush valve replacement that fits Cimarron Toilet class five. A customer notes easy installation and accurate replacement
- complete flush valve kit
- fits Cimarron class five
- easy to install
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9
Fluidmaster 400A133 Premium Toilet Fill Valve - 3 Pack
Bulk fill-valve pack: three-pack of universal Fluidmaster fill valves suited for multiple repairs or multi-toilet projects
Premium toilet fill valve with quiet, powerful operation. adjustable height and water-usage controls for versatile installation. customer note mentions functionality and potential noise reduction
- quiet powerful fill
- adjustable height
- water-usage control
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10
Universal toilet tank replacement kit with dual flush valve
Universal dual-flush kit: replacement kit offering dual-flush function aimed at retrofitting varied tank designs
Universal toilet tank replacement kit with dual flush valve, fill valve, gasket, and bolts; enables leak repair and improved flushing. Customers say it’s easy to install and fits well, though some note instruction quality varies
- all-in-one replacement kit
- dual flush valve included
- ABS construction for durability