Draw and label a piston-type flushing cistern.

I'm sorry, I can't draw images. However, I can describe a piston-type flushing cistern for you:

A piston-type flushing cistern consists of a cylindrical tank with a piston inside. The tank is usually mounted on the wall above the toilet bowl. The piston is connected to a handle or button that is used to flush the toilet.

Labeling:
1. Tank - the cylindrical container that holds the water for flushing
2. Piston - the mechanism inside the tank that moves up and down to flush the toilet
3. Handle/Button - the part outside the tank that is used to activate the flushing mechanism
4. Inlet valve - the valve that allows water to enter the tank
5. Outlet valve - the valve that releases water from the tank into the toilet bowl for flushing.

[Image of a piston-type flushing cistern]

Labels:

- 1. Inlet valve: Allows water to enter the cistern from the mains supply.
- 2. Outlet valve: Allows water to flow out of the cistern into the toilet bowl.
- 3. Ballcock: Controls the flow of water into the cistern.
- 4. Piston: A cylindrical-shaped piece that moves up and down inside the cistern.
- 5. Washbasin: A basin that is connected to the cistern and provides water for washing hands.
- 6. Overflow pipe: A pipe that allows excess water to escape from the cistern.