(a) For the purpose of this article, the following definition shall apply unless the context clearly indicates or requires a different meaning.
PLUMBER or PLUMBING CONTRACTOR.
(A) Any person engaged in the business of installing, altering, maintaining or repairing plumbing, which shall include all materials and plumbing fixtures, water pipes, portable water treatment equipment, traps, drainage and vent piping, and building drains, including their respective points, connections, devices, receptacles and appurtenances located within the property lines of any premises or in any building; and
(B) Any gas-fitter or person engaged in the business of installing, altering or repairing fuel gas piping, gas systems or fixtures.
(b) A plumber or plumbing contractor as defined in division (a) above shall not mean or include the owner of a residence who personally installs plumbing piping or equipment within and upon his or her own residence and intended for his or her own personal use and permanent occupancy; provided, the owner shall satisfy the Plumbing Inspector as to his or her ability to install such piping or equipment, secure a permit, pay required fees, do work in accordance with this article and apply for an inspection and receive approval. Personal installation by an owner under this section shall be himself, herself, for himself or herself on his or her own residence, without compensation and no person shall be employed to assist him or her in any way on such work except a plumber or plumbing contractor licensed by the city.