Fluidmaster PerforMAX Toilet Fill Valve and Flapper kits come in 2- and 3-inch sizes and also a tower (piston-style) system. The 2-inch kit includes a fill valve and flapper with built-in adjustability, so water levels can be fine-tuned for a stronger flush. The solid frame flapper offers reliability and will provide a secure seal. The 3-inch kit includes a fill valve and flapper with a silicone seal that lasts up to 10 times longer than standard flappers. The tower system has different flush valves than the other two and can be identified by the tower object with a round colored seal where the flush valve opens and lets the water out of the tank. The seals will be either red, blue, yellow or clear. 949-728-2000; www.fluidmaster.com.