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

4.6 stars out of 1309 reviews
(4.6)|
1,309 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 Size:Single

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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About this item

Product details

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Warranty

Customer ratings & reviews

4.6 out of 5 stars
stars1,309 ratings364 reviews
How item rating is calculated
  1. 5 stars81% (1,055)
  2. 4 stars12% (151)
  3. 3 stars3% (42)
  4. 2 stars1% (16)
  5. 1 star3% (45)

Reviews summary

Pros
  • : Easy to follow with simple steps.
  • : Offers good value for the money.
  • : Fits toilet dimensions precisely and easily.
  • : Allows for height and shut-off adjustments.
Neutral
  • : Can be effective, but may have issues with leaks or slow flushing.
  • : Can be effective, but may not fit all models properly.
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Showing 1-3 of 364 reviews

Sep 9, 2025
Lifeafte
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

I have had this type of valve for many years which makes the installation of the working parts very simple. I just turned off the supply valve at the wall,drained the tank. Released the clamp on the old valve,slid it up and off and slid the new valve down on the stem, locked it in place with the ring and adjusted it to match the old one. Always replace the rubber flapper as it snaps in place and finish the job. I keep the stem and seal in case it might need to be replaced but so far it has been years since I put the first one in.

Helpful?442U91TTOHKL379610673
Oct 26, 2025
Walmart customer
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

If I did it, you can fix your toilet too!!!!

I was worried to attempt to fix a toilet by myself, but tired of waiting on a man to do it for me, I ordered this it. I watched the YouTube video that the package directed me to, and followed the easy steps. Boom….my toilet flushes and it no longer runs endlessly. I am excited for the other toilets in my house to break so I can order this again. Five stars.

Helpful?442U91TTOHKL379610673
Jan 11, 2026
Tman
Walmart Associate
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Fluidmaster Repair Kit

The Fluidmaster flapper repair kit worked well and stopped the leak immediately. The Instructions were clear and easy to follow, making installation quick even for a beginner. After installing, the toilet flush was smooth and consistent with no more running water. The flapper had a good fit change compared to the old one, sealing better and improving overall performance. Overall, a solid and affordable fix.

Helpful?442U91TTOHKL379610673