Owning your home comes with a multitude of potential new responsibilities. Although many tasks can be accomplished by the average layman, it might be best to leave plumbing to the professionals and don't DIY.
Plumbing professionals are required to be certified through specialized training and on the job experience. A plumbing apprenticeship alone requires:
5 year training program
8,000 hours on-the-job training
500 hours paid related instruction