(a) It shall be unlawful for any person to deposit into the building drainage system or sewer any ashes, cinders, rags, poisonous or explosive liquids, gases, oils, grease, or any other material which would or could obstruct, damage, or overload such system or sewer.
(b) It shall be unlawful for the owner or occupant of any building or premises to use, or permit anyone else to use, said building or premises unless said building or premises shall be connected to a water supply sufficient to insure that sewer pipes will be kept free from accumulation of select materials and obstructions.