Best Toilet Tank Kit In May 2025

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Check out our product review of the Best Toilet Tank Kit. We tried 10 models and can tell you the absolute best varieties.

To help you in your search, we have completed this list of the Best Toilet Tank Kit.

Top Rated Best Toilet Tank Kit Of 2025

Rank	Product Name	Score
1	Fluidmaster 400CRP14 Universal Toilet Fill Valve and Flapper Repair Kit, for 2-Inch Flush Buy Now	9.7 Buy Now
2	Fluidmaster Tank To Bowl Bolt & Gasket Kit 6102 Buy Now	9.5 Buy Now
3	Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve Buy Now	9.1 Buy Now
4	Korky 100BP Ultra High Performance Flapper Fits Most Toilets - Long Lasting Rubber Buy Now	8.8 Buy Now
5	Fluidmaster 400AKRP10 Universal, All In One, Complete Toilet Tank Repair Kit For 2-Inch Buy Now	8.6 Buy Now
6	Korky 5030BP Universal Toilet Flush Valve, Flapper and Tank to Bowl Gasket Kit Buy Now	8.3 Buy Now
7	Kohler Genuine Part 1083980 3" Toilet Canister Flush Valve Kit Buy Now	8.1 Buy Now
8	DANCO Universal Toilet Tank Repair Kit, 1-Pack (80816) Buy Now	7.8 Buy Now
9	Fluidmaster 502P21 2-Inch Universal PerforMAX Longest Lasting, Water Saving Toilet Flapper Buy Now	7.5 Buy Now
10	Kohler Genuine Part Gp1083167 Silent Fill Valve Kit For All Kohler Class Five Buy Now	7.2 Buy Now

1. Fluidmaster 400CRP14 Universal Toilet Fill Valve and Flapper Repair Kit, for 2-Inch Flush

• This product has a 5 year warranty and is the solution to fix a noisy and running toilet
• The 501 flapper has microban that prevents breakdown due to bacteria
• High quality and durable toilet fill valve
• Ideal product for use in 3.5 gallons per flush toilets or larger
• Features the proven 400a anti-siphon toilet fill valve
• Note: this product is designed to fit toilets with 2 flush valves

2. Fluidmaster Tank To Bowl Bolt & Gasket Kit 6102

• Tank-to-bowl 2 bolts & gasket kit

3. Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve

• Fix noisy, slow filling valves with the quietest, most powerful toilet fill valve on the market!
• Easy-to-install performax design
• Performax technology achieves 2x greater refill rate, while saving water usage
• Replaces outdated, inefficient, or noisy fill valve designs
• 7 year warranty
• Height adjusts easily between 10 15

4. Korky 100BP Ultra High Performance Flapper Fits Most Toilets - Long Lasting Rubber

• Long lasting chlorazone red rubber resists chlorine, bacteria, city water treatment, hard & well water. this toilet part replacement includes the universal adjustable flapper & stainless steel chain.
• Universal flapper: the 2" universal flapper adjusts to fit flush valves in het toilets & the flexible long lasting rubber creates a tight seal.
• For leaking & running toilets: save on expensive water waste with this large toilet flapper with a universal & adjustable design that fits standard flush valves & newer toilet models. no tools required.
• Replacement toilet parts: try korky toilet repair because we continue to commit to designing toilet repair parts that are unviersal to fit the majority of toilets. designed & manufactured in wisconsin.
• Why korky: our high quality toilet products are universal & specific to both older & modern toilet models. our repair parts are easy to install & made exclusively from long lasting chlorazone red rubber.

5. Fluidmaster 400AKRP10 Universal, All In One, Complete Toilet Tank Repair Kit For 2-Inch

• Performax 2 adjustable water-saving toilet flapper included
• Everything needed to make your toilet run like new!
• 5-year warranty
• Universal design fits most toilet models
• Fits 2 flush valve toilets
• Easy-to-install, simple instructions included

6. Korky 5030BP Universal Toilet Flush Valve, Flapper and Tank to Bowl Gasket Kit

• Fixes all common fill valve and flapper problems, including, running, noisy, slow/weak or no refilling toilets
• Adjusts to fit most 3-inch flush valves found in newer, het toilets including, american standard, aquasource, crane, eljer, ferguson, gerber, glacier bay, jacuzzi, mansfield, pegasus, toto and many more
• Made in usa - proudly made in america and backed by a 5 year
• Korky invented the flapper and is still the preferred brand by plumbers for superior quality and reliability
• Exclusive longest lasting red rubber resists chlorine, bacteria, city water treatment, hard water, and well water
• Flapper made of flexible rubber for a tight seal on most flush valves

7. Kohler Genuine Part 1083980 3" Toilet Canister Flush Valve Kit

• Compatible with kohler cimarron tank model number k 4634
• Look inside the back wall of the toilet tank to identify tank model number. material: plastic
• Complete assembly with tank to bowl gasket. inlet diameter: 0.5 inches
• Kohler genuine part
• Canister flush valve kit for kohler cimarron toilets
• 3 inches canister with a 3 inches outlet

8. DANCO Universal Toilet Tank Repair Kit, 1-Pack (80816)

• Easy to install
• Includes: universal flapper with adapter, spring, float with rod, and ballcock with refill tube
• Single-flush applications
• Durable plastic construction
• Reliable performance

9. Fluidmaster 502P21 2-Inch Universal PerforMAX Longest Lasting, Water Saving Toilet Flapper

• This performax water-saving flapper helps solve common running toilet problems
• Universal performax design fits most toilet models
• Easy-to-install
• Rigid frame aligns flapper properly on every flush
• 5-year warranty
• Adjusts for maximum flush efficiency

10. Kohler Genuine Part Gp1083167 Silent Fill Valve Kit For All Kohler Class Five

• Confirm shank color to determine correct part, if black, use this part and if grey, use gp1138930
• Cap color may vary
• Silent fill provides a gracious experience by filling the tank quietly
• Adjustable to accommodate any height. never use an abrasive material such as a brush or scouring pad to clean surfaces
• Multiple fill rate inserts are provided to optimize performance and conserve water
• Kohler genuine part