The answer to 'pressure regulator overflowing' is that a pressure regulator that is overflowing or leaking water is likely due to a problem with the regulator itself or the plumbing system. Common causes include a faulty pressure regulator, high water pressure, or a blockage in the system. Symptoms may include water leaking from the regulator, low water pressure, or the regulator making noise.
If the pressure regulator is overflowing, it's best to call a professional plumber to diagnose and repair the issue. Attempting to fix it yourself could lead to further damage or safety hazards. A plumber can inspect the regulator, check the water pressure, and make any necessary repairs or replacements to resolve the problem.