All service installations connected to the water system that have been abandoned or, for any reason, have become useless for further service shall be disconnected at the main. The owner of the premises, served by this service, shall pay the cost of the excavation and the restoration. The City shall perform the actual disconnection and all pipe and appurtenances removed from the street right-of-way shall become the property of the City. When new buildings are erected on the site of old ones, and it is desired to increase the old water service, a new permit shall be taken out and the regular tapping charge shall be made as if this were a new service. It is unlawful for any person to cause or allow any service pipe to be hammered or squeezed together at the ends to stop the flow of water, or to save expense in improperly removing such pipe from the main. Also, such improper disposition thereof shall be corrected by the City and the cost incurred shall be borne by the person causing or allowing such work to be performed. (1988 Code § 3.30)