Fill Valves

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400H - PerforMAX® Fill Valve

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Fluidmaster 400H ® Toilet Fill Valve is one of the most quietest fill valve with the most powerful flush. The 400H comes with both tank and bowl water control for a more powerful flush. The adjustability of the bowl water helps this valve work in all older as well as newer toilets. If your toilet is slow filling, noisy, or is running constantly, then replace your fill valve with the Fluidmaster PerforMAX® 400H valve.

  • Fix noisy, or slow filling toilet with the quietest, most powerful toilet fill valve
  • A fill valve with both tank and bowl water control for a more powerful flush
  • The adjustability of the bowl water helps newer, 1.28 gpf and lower flow toilets flush efficiently
  • Easy to install
  • Universal fit for most toilets
  • 2X greater bowl refill for a more powerful flush than standard designs
  • EZ-Twist height adjusts from 9 in. to 14 in. to fit more tanks
  • 7 year warranty



You could also watch this installation video for the 400H fill valve:

400H - PerforMAX® Fill Valve

Download Installation Instructions



Frequently Asked Questions

  • What is the difference between the 400A and the 400H toilet fill valves?

  • What is the Fluidmaster toilet fill valve that I should I purchase to replace my original 400 fill valve?

  • How do I choose the right Fluidmaster fill valve for my toilet?

  • What does higher refill rates mean when describing a fill valve?

  • What does H.E.T. mean?


Cancer and Reproductive Harm -


The 400H - PerforMAX® Fill Valve is available online, from our following retail partners.