The answer to 'my pressure regulator is leaking' is that a leaking pressure regulator is a common plumbing issue that can have several causes. The most likely reasons are a worn-out diaphragm, a buildup of debris, or a problem with the regulator's spring. Symptoms include low water pressure, dripping from the regulator, and water damage around the unit.
In many cases, a leaking pressure regulator can be fixed with a simple repair or replacement. However, if the issue is more complex, it's best to call a professional plumber. Attempting to repair the regulator yourself could potentially make the problem worse or lead to further damage.