The answer to 'pressure regulator burst pipe' is that a failed or malfunctioning pressure regulator is a common cause of burst pipes. When a pressure regulator fails, it can allow excessive water pressure to build up in the plumbing system, leading to pipes bursting or leaking. Symptoms may include low water pressure, banging noises, or visible leaks around the regulator.
The solution is to replace the faulty pressure regulator. This is a job best handled by a professional plumber, as they can properly assess the issue, select the right replacement part, and ensure the new regulator is installed correctly. Attempting to DIY this repair can be risky and lead to further damage if not done properly.