Fluidmaster 400ARHRLS PerforMAX High Performance Toilet Fill Valve with Leak Sentry Automatic Leak Prevention No other universal fill valve on the market will help your toilet run better than the per for max Made of durable corrosion resistant materials Highest refill rate of any fill valve on the market allows you to optimize your toilet's performance-2 times higher refill rate than standard fill valves Double flange design allows for the quietest fill valve available Refill adjuster and leak sentry protection save water