Toilet Repair Kits

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K-400H-040-T5 - PerforMAX® Fill Valve & 3 inch Flapper Repair Kit

You can purchase this repair kit from the Fluidmaster Online Store

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The PerforMAX Fill Valve and 3 in. Flapper kit offers solutions for common toilet problems like noisy, leaky or slow filling toilets. This repair kit includes the 400H fill valve and the 5403 flapper.

The Fluidmaster K-400H-040 PerforMAX High Performance Toilet Fill Valve and Adjustable 3 in. Flapper Kit is designed to offer the same high performance, and water-saving performance as our other repair kits, but specifically made for newer HET 3 in. flush valve toilets.

  • The PerforMAX fill valve and 3 in. flapper kit is the top solution to upgrade your toilets fill and flush in one repair kit
  • Easy to install, made for 3 in flush valve toilets
  • High performance toilet fill valve offers both tank and bowl water level adjustment dials
  • EZ-twist adjustable fill valve height to fit more tanks
  • PerforMAX water-saving toilet flapper adjusts to save water per flush
  • Solid fame design to resist twisting and eliminate leaks
  • Fill valve and 3 in. flapper replacements built to save water
  • Corrosion resistant flapper with silicone seal lasts up to 10X longer than standard designs
  • 7 year warranty

How to install the 400H toilet fill valve video:

How to install the 5403 flapper video:

K-400H-040-T5 - PerforMAX® Fill Valve & 3 inch Flapper Repair Kit

Download Installation Instructions

Frequently Asked Questions

  • What size flapper do I need?


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The K-400H-040-T5 - PerforMAX® Fill Valve & 3 inch Flapper Repair Kit is available online, from our following retail partners.