What common plumbing component is typically found in a house and uses pressure for operation?

The faucet is a common plumbing component found in residential settings that operates using water pressure. When the faucet is opened, the water pressure in the plumbing system forces water out of the spout, allowing for the control of water flow and temperature through the use of handles or knobs. This mechanism relies on the pressure of the water supply, either from the municipal system or through a private well, to deliver a steady stream of water for various tasks, such as washing hands, cooking, or cleaning.

While other components like the water heater and toilet also utilize pressure to some extent, they serve different primary functions. A water heater typically stores and heats water, and while it may maintain some pressure, it does not directly manipulate water flow in the same manner as a faucet. A toilet relies on pressure for flushing but is more about waste removal rather than providing a consistent flow of water. The showerhead, like the faucet, uses water pressure to deliver water for bathing, but it is an attachment connected to the plumbing system and mainly functions in conjunction with the faucet mechanism to provide a shower experience. Thus, the faucet is the most direct and clear example of a plumbing component that operates with pressure to provide controlled water flow.