Electrifying the Future: Ace Your 3rd Year Electrical TQ Exam 2026!

The amount of water released during a flush is set by the opening in the flush valve. The adjustable faceplate sits on top of the valve and is turned or modified to change that opening. A larger opening lets more water flow with each flush, giving a stronger or higher-grade flush, while a smaller opening reduces the volume for a gentler flush. The other parts—Inlet valve (the fill valve), Float cup (part of the fill valve that controls the tank refill level), and Seat ring (the seal of the valve)—do not control how much water is discharged during a flush, so they don’t set the flush grade.