Final answer:
In a ceramic-disc faucet, the discs rotate against each other to control water flow, unlike other faucets that might use different mechanisms. They are known for durability and a watertight seal.
Step-by-step explanation:
The discs in a ceramic-disc faucet rotate against each other to control the flow of water. This is different from other mechanisms that might expand and contract with temperature changes or slide vertically.
In ceramic-disc faucets, the discs control the flow and temperature of the water by creating a watertight seal when they are in the closed position. As one disc is rotated in relation to the other, passages align to allow water to pass through. This design is known for its durability and resistance to wear.