Who is the biggest general contractor in the US?

While the average plumber's annual income typically ranges from $40,000 to $70,000, those who reach advanced levels within the profession can indeed earn $100,000 or more per year. Specifically, plumbing engineers, who are responsible for designing complex plumbing systems for residential, commercial, or industrial buildings, often have higher earning potential due to their specialized skills and educational requirements. Additionally, experienced plumbers who own their own businesses or contracting companies can increase their earnings significantly through business growth, project management, and a steady client base. Therefore, reaching a six-figure income is possible for highly skilled, experienced professionals in the plumbing industry, especially those in managerial or entrepreneurial roles.