Water closets (commonly called toilets) vary in general design and in the design of the flushing mechanism. But they are enough alike that general repair instructions can suffice for all designs.
[Figure 7] shows a common type of flushing mechanism. Parts that usually require repair are the flush valve, the intake (float) valve, and the float ball.
In areas of corrosive water, the usual copper flushing mechanism may deteriorate in a comparatively short time. In such cases, it may be advisable to replace the corroded parts with plastic parts. You can even buy plastic float balls.
Flush Valve
The rubber ball of the flush valve may get soft or out of shape and fail to seat properly. This causes the valve to leak. Unscrew the ball from the lift wire and install a new one.
The trip lever or lift wire may corrode and fail to work smoothly, or the lift wire may bind in the guides. Disassemble and clean off corrosion or replace parts as necessary.
Most plumbing codes require a cutoff valve in the supply line to the flush tank, which makes it unnecessary to close down the whole system ([fig. 7]). If this valve was not installed, you can stop the flow of water by propping up the float with a piece of wood. Be careful not to bend the float rod out of alignment.
Intake (Float) Valve
A worn plunger washer in the supply valve will cause the valve to leak. To replace the washer—