(A) The proper maintenance and operation of a building service sewer, house connection or sanitary sewer line to the point of connection to the municipal sanitary sewer system shall be the responsibility of the owner of the premises served by such sanitary sewer pipes.
(B) Maintenance means keeping the sanitary sewer connection, sewer lines or other sewer facilities or structures in satisfactory working condition and good state of repair, including, but not limited to, preventing any obstruction or extraneous materials or flows from entering such facilities, protecting such facilities from any damage and keeping same free from defects or malfunctions, and making necessary provisions and taking necessary precautions to assure that such sewer facilities are at all times capable of satisfactorily performing the services and adequately discharging the functions and producing the final results and purposes such facilities are intended to perform, discharge or produce.
(`95 Code, § 51.40) Penalty, see § 51.99