The answer to 'what causes pressure regulator' is that a pressure regulator is a device used in plumbing systems to control and maintain the water pressure at a consistent, safe level. Pressure regulators are typically installed where the main water supply line enters a home or building, and they help prevent damage to pipes, appliances, and fixtures from excessively high water pressure.
High water pressure can be caused by a variety of factors, including the municipal water supply, elevation changes, or even issues with the plumbing system itself. A pressure regulator works by automatically adjusting the water flow to maintain the desired pressure, usually between 40-80 PSI. This helps protect your plumbing and ensures consistent water pressure throughout your home.