Different types of plumbers practice different specialties. Some only work with commercial plumbing systems, some specialize in residential systems, and others do both. Different types of plumbers can do superior installation, only repair and maintenance, or both. If you need help at home, you can always find plumbing services. In the residential and commercial plumbing industry, the types of plumbers are also divided according to the plumbing they work on - plumbing or sewer. Personally, I would go to a trusted professional instead of trying to fix something and break something myself.