The answer to 'best pressure regulator' is a pressure regulator that is properly sized for your home's plumbing system and water pressure needs. A good pressure regulator will maintain consistent water pressure, protect your plumbing from high pressure, and help prevent leaks and damage to fixtures and appliances.
When choosing a pressure regulator, consider the size of your home, the number of fixtures and appliances, and the incoming water pressure. Most homes require a 3/4-inch or 1-inch pressure regulator that can handle 40-80 PSI of incoming water pressure and reduce it to a safe 40-60 PSI. Installing the regulator close to the main water supply line ensures optimal performance.