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 1530 reviews
(4.6)|
1,530 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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Current price is $16.97
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Customer ratings & reviews

4.6 out of 5 stars
stars1,530 ratings391 reviews
How item rating is calculated
  1. 5 stars81% (1,234)
  2. 4 stars11% (169)
  3. 3 stars4% (56)
  4. 2 stars1% (19)
  5. 1 star3% (52)

Reviews summary

Pros

  • : Installation process is well-guided with clear instructions.
  • : Directions are easy to follow and well-written.
  • : Offers good value for the money.
  • : Accommodates various tank sizes and toilet models.

Neutral

  • : Can be effective, but may not fit all models properly.
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Showing 1-3 of 391 reviews

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 22, 2026
JUSTIN
Item details
Multipack quantity: 1
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
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