A plumber is a skilled tradesperson specializing in the installation and repair of piping systems, fixtures
https://www.scribd.com/document/801608879/Why-Regular-Inspections-by-a-Residential-Plumber-are-Crucial-for-Your-Home-s-Health-194651
A plumber is a skilled tradesperson specializing in the installation and repair of piping systems, fixtures, and appliances