To check the flush valve, flush the toilet and let the water rise.
If the water level has fallen, the flush valve is leaking.
A flush valve can also be cleaned by scrubbing it with fine steel wool.
Is the flush valve located on the side adjacent to the lavatory?
All flush valves come with instructions and are easy to install.
If leaking still persists, the problem may be a loose flush valve.
If the handle is loose, the parts linking it with the flush valve may be misaligned.
The diaphragm technology allows the flush valve to open and let water into the bowl.
The beginning was difficult but in 1953 the company started to recover when introduced the industry of flush valve.
You can add a timer to the flush valve.