A stop and waste cock of approved pattern, by means of which pipes in a building may be drained, must in all cases be placed just inside the basement wall in a convenient location. If the building or premises is not provided with a basement, such stop and waste cock must be placed near the outside wall thereof and protected by a suitable box. Variations to the above regulation will be permitted only when approved, in writing, by the City water department. (Ord. 4-1982 § 19, 1982.)