Which plumbing component is designed to reduce pressure in the system?

The pressure regulator is specifically designed to manage and reduce the pressure of water in a plumbing system. It ensures that water entering a home or building does not exceed a safe and manageable level, thus protecting both the plumbing system and the fixtures connected to it. High pressure can lead to leaks and damage to pipes and appliances, so the pressure regulator serves an essential function in maintaining the overall integrity and functionality of the plumbing system.

In contrast, a water heater's primary function is to heat water for various tasks, such as bathing or washing, without playing a role in pressure regulation. Drainage pipes are responsible for removing wastewater and do not influence water pressure. A flow restrictor is used to limit the flow rate of water, but it does not specifically address or control pressure within the system. Therefore, the pressure regulator is the component that directly contributes to reducing pressure in the plumbing system.