Plumbing may be defined as the practice, materials, and fixtures used in installing, maintaining, and altering piping, fixtures, appliances, and appurtenances in connection with sanitary or storm drainage facilities, a venting system, and public or private water supply systems.

There are five main types of plumbing pipe materials that are still in use today: copper, galvanized steel, polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), and cross-linked polyethylene (PEX). Chlorinated polyvinyl chloride (CPVC) is also used.

plumbing work means the installation, alteration, extension, replacement, repair or maintenance of any plumbing, piping, fixtures, devices, appliances and appurtenances in connection with sanitary drainage or storm drainage system, the attendant vent systems and water supply systems, within or adjacent to any building

The plumbing system is one of the essential systems in commercial or residential buildings. It comprises three different types of plumbing systems: mainly sewage, water, and drainage plumbing. Each type of plumbing system is designed, installed, maintained and repaired by professional plumbers to ensure efficiency.