Fluidmaster K-400H-039 PerforMAX Toilet Fill Valve and 2" Flapper Repair Kit, Plastic, 1-Pack, Height 13.9in
Fluidmaster K-400H-039 PerforMAX Toilet Fill Valve and 2" Flapper Repair Kit, Plastic, 1-Pack, Height 13.9in
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Fluidmaster K-400H-039 PerforMAX Toilet Fill Valve and 2" Flapper Repair Kit, Plastic, 1-Pack, Height 13.9in

2,308 ratings
Fluidmaster K-400H-039 PerforMAX Toilet Fill Valve and 2" Flapper Repair Kit, Plastic, 1-Pack, Height 13.9inFluidmaster K 400H 039 PerforMAX Toilet Fill Valve and 2 Flapper Repair Kit Plastic 1 Pack Height 13 9in2 pack Fluidmaster K 400H 039 PerforMAX Toilet Fill Valve and 2 Flapper Repair Kit Plastic 1 Pack Height 13 9in4 pack Fluidmaster K 400H 039 PerforMAX Toilet Fill Valve and 2 Flapper Repair Kit Plastic 1 Pack Height 13 9in
Pack SizeSingle

Key item features

  • Top Choice: The Fluidmaster K-400H-039 Repair Kit is the top choice to make your 2 in. flush valve toilet run like new.
  • Adjustable Water Levels: PerforMAX high performance toilet fill valve offers adjustable tank and bowl water levels for full water control.
  • Easy Installation: Fast and easy to install, designed to fit 2 in. flush valve toilets.
  • Height Adjustable: EZ-twist adjustable fill valve height to fit more tanks, ranging from 10 in. to 15 in.
  • Corrosion Resistant: Features a corrosion resistant flapper with a solid frame to eliminate twisting and leaks.
  • Water-Saving: Includes the PerforMAX Water-Saving Toilet Flapper with an adjustable dial to customize water use.
  • Durable Materials: Made with hard water resistant materials and built-in Microban technology to fight bacteria and breakdown.
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Customer ratings & reviews

4.6 out of 5 stars
stars
2,308 ratings523 reviews
How item rating is calculated
  1. 5 stars81% (1,876)
  2. 4 stars10% (223)
  3. 3 stars4% (88)
  4. 2 stars2% (45)
  5. 1 star3% (76)

Reviews summary

Pros

  • : Installation process is well-guided with clear instructions.
  • : The manual provides step-by-step directions to speed setup.
  • : Offers good value in its category.
  • : Assembly installs easily and aligns to specified dimensions.
  • : Allows for easy water level adjustment.

Neutral

  • : Unit matches toilets but misaligns on wrong-size tanks or flappers.
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Showing 1-3 of 523 reviews

Jun 26, 2026
Reviewer name: Abigail
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

The Fluidmaster K-400H-039 PerforMAX Toilet Fill Valve and 2" Flapper Repair Kit is an excellent all-in-one solution for fixing common toilet issues. It had everything needed to restore my toilet to like-new performance, and the installation process was much easier than expected. The instructions were clear, and the adjustable fill valve made it simple to achieve the correct water level. After installation, the toilet filled quickly, flushed powerfully, and stopped the constant running that had been wasting water. The quality of the components is outstanding. The fill valve and flapper are made from durable materials that feel built to last, and everything fit perfectly without requiring additional parts. The adjustable height makes it compatible with a wide variety of toilets, which is a huge plus. I also appreciate how quiet the fill valve operates compared to my old one. It improved both the performance and efficiency of the toilet, making it well worth the purchase. Overall, the Fluidmaster K-400H-039 Repair Kit is reliable, easy to install, and offers excellent value. It's a great DIY repair that saves time and money while restoring your toilet's performance. Highly recommended and definitely deserving of a 5-star review!

Helpful?442U91TTOHKL379610673
Feb 14, 2026
Reviewer name: Jennifer
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Easy for DIY'er

Was having an issue in the toilet not flushing right. Googled some fix options. It was cheaper to buy this kit than the items separately. Plus I had other pieces left over in case needed next time I have issues. Fit was fine, pretty easy to install. I didn't even bug the hubby.

Helpful?442U91TTOHKL379610673
Jan 22, 2026
Reviewer name: JUSTIN
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Fluidmaster is the Gold Standard for Toilet Tank fill Valves. So glad Walmart had this in stock. A friend of mine had moved into a new place and it needed a new one of these. I ordered it on Walmart com and picked it up from the store. Very Pleased it works wonderfully.

Helpful?442U91TTOHKL379610673
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