The answer to 'repiping slow draining' is that a slow draining sink or tub is often caused by a clogged or damaged plumbing pipe. Over time, pipes can become blocked with hair, soap scum, and other debris. This restricts water flow and leads to slow draining. Repiping, or replacing the old plumbing pipes, is a common solution to address chronic slow draining issues.
Some common signs that repiping may be needed include frequent clogs, gurgling noises, and water draining very slowly. If the problem is isolated to one fixture, you may be able to fix it with a plunger, drain snake, or chemical drain cleaner. However, if the slow draining affects multiple fixtures, it's likely a more systemic issue that requires professional repiping. Repiping is best left to licensed plumbers, as it involves tearing into walls and replacing the entire plumbing system.