Plumbing is maintaining, modifying piping, installing, appurtenances, and appliances connected with sanitary or venting systems, public or private water supply, and storm drainage systems. Plumbing does not include drilling water wells, installing water softening equipment, or producing or selling plumbing fixtures, equipment, devices, or appliances. A plumbing system consists of a sufficient supply of potable water, an acceptable and secure sewerage system, and types of equipment & fixtures. On