What skills and knowledge a plumber needs in order to carry out the job competently?

A competent plumber needs a strong understanding of Plumbing systems, including water supply, drainage, and venting. They should possess technical skills for installing, repairing, and maintaining pipes, fixtures, and appliances. Familiarity with building codes, safety regulations, and the ability to read blueprints and technical drawings are also essential. Additionally, good problem-solving skills and effective communication are important for interacting with clients and addressing issues efficiently.