How do you know if your house needs repiping?Should I call a plumber or do it myself?What is the most common source of a water leak in a person's house?What are some common things that plumbers fix?How do you tell if pipes are going bad?What are the worst plumbing problems?How can you tell if you have a leak in your house?What do plumbers do when they need to access pipes that are behind walls?What happens when water leaks into walls?How much does it cost to fix a leaking pipe behind a wall?