Which type of plumbing component helps maintain water pressure in a system?

A pressure regulator is essential for maintaining consistent water pressure within a plumbing system. Its primary function is to reduce and stabilize the incoming water pressure from the supply line to a manageable level that is safe for household plumbing fixtures and appliances. High water pressure can lead to damaging leaks, bursts, and wear on fixtures, whereas low pressure can hinder the performance of faucets and appliances. By automatically adjusting excess pressure, a pressure regulator ensures that water flows smoothly and efficiently throughout the plumbing system, contributing to its overall reliability and longevity.

In contrast, a water heater's primary role is to heat the water for various uses and does not have a direct influence on water pressure levels. A trap is designed to prevent sewer gases from entering the home and does not play a role in managing water pressure, while a cleanout serves as an access point for clearing clogs in the sewer system. Each of these components has its specific function, but only the pressure regulator actively manages and maintains water pressure.