There are two basic constructions for faucets. There are many different types, but all use one of the following four parts to make them work: cartridge, compression, ball or disc.
High-quality faucets feature cartridges, which require no washers and no springs to make them function. Faucets with cartridges have a much less chance of leaking.
The cartridge itself is very durable and often comes with a warranty.
These faucets feature seals that close against valves to monitor water flow. To prevent leaking, these faucets feature O-rings and seals.
The disc faucet has a mobile upper disc and a stationary lower disk. The combination of these discs regulates the flow of water.
This type of faucet is washerless and operated by a lever and slotted ball. If your ball faucet is leaking, it is normally due to worn inlet seals or O-rings.
This device reduces the quantity of water that flows from your faucet. It also ensures adequate water flow.