- Fixes noisy, slow filling toilets - Easy to install - Universal fit – Best for newer, smaller toilet tanks (1.28-1.6 GPF) - NEW: Bowl water level adjustment dial allows you to set the proper water level to ensure a cleaner bowl - NEW: Tank water level adjustment screw is now easier to turn, eliminating need for tools to raise and lower float - Easy to adjust height allows fill valve to fit more tanks (9-14 in) - 7 year warranty Our most powerful solution, is now even QUIETER, FASTER and EASIER TO INSTALL. Fluidmaster’s PerforMAX 400H Fill Valve sets the standard for not only performance, but also installation. Our NEW Quick Install Guide walks you through installation so that everyone from novice to expert can fix their own toilet. The new, revolutionary Bowl Water Level Adjustment Dial was designed for newer toilets with smaller tanks to allow you to adjust the bowl water level so that that more water filters into the bowl, ensuring a cleaner bowl. The tank water level is now easier to turn, allowing you to set the proper water level in your tank for the best flush for your toilet. If you have a newer, smaller, toilet tank (1.28-1.6 Gallons Per Flush) this is the fill valve for your toilet!