Profile: Michael's Plumbing specializes in providing plumbing repair services. We can repair an existing water heater, install a new water heater, or repair the section of damaged piping. Copper water lines break down over time and may become very thin & brittle. When the wall of the pipe is worn away due to this break down, it can no longer hold the water pressure in the system. At that point a pin hole could develop and a water leak occurs. The leak usually will start very small, and unfortunately could go unnoticed for quite some time.