Plumbers are tradespeople who specializes in installing and maintaining plumbing, heating and gas services in domestic and commercial properties.

The word "plumber" dates from the Roman Empire. In Roman times lead was known as plumbum in Latin which is why the periodic table of the elements uses the symbol of 'Pb' for lead. Roman roofs used lead in conduits and drain pipes and some were also covered with lead, lead was also used for piping and for making baths. In medieval times anyone who worked with lead was referred to as a plumber.

Plumbers install and repair pipes, fittings, fixtures, and other plumbing equipment used for water distribution, waste water disposal in residential, commercial and industrial buildings. Many plumbers begin their careers in plumbing as helpers to established Plumbers others enter formal training institutes.