The answer to 'types of pressure regulator' is that there are several common types of pressure regulators used in plumbing systems. The most common types are inline pressure regulators, which install directly into the plumbing line, and whole-house pressure regulators, which are installed at the main water supply line to regulate the pressure for an entire home.
Inline pressure regulators are typically smaller and less expensive, and they regulate the pressure for a specific fixture or appliance. Whole-house pressure regulators are larger and more complex, and they regulate the pressure for all the water supply lines in a home. Both types use a spring-loaded diaphragm mechanism to sense and control the water pressure.