P-102.1 General: The provisions of these regulations shall cover all matters affecting or relating to plumbing as set forth in Section P-101.0.

P-102.2 Existing structures: The legal use and occupancy of any structure existing on the effective date of this code, or for which it has been heretofore approved, shall be permitted to continue without change except as is specifically covered in this code or as deemed necessary by the department to secure the intent of this code.

P-102.3 Alterations, additions and repairs: Alterations, additions and repairs to any plumbing system shall conform to that required for a new plumbing system without requiring the existing plumbing to comply with all the requirements of this code. Alterations, additions and repairs shall not cause an existing plumbing system to become unsafe or adversely affect the performance of the plumbing. Where additions or alterations impose loads on parts of existing systems which exceed those permitted herein, such parts shall be made to comply with this code.

P-102.4 Referenced codes: Where this code references the administrative, building, electrical, fire prevention, property maintenance or zoning codes, it shall mean the City of Philadelphia Code of such title currently in effect unless specifically stated otherwise.

P-102.5 Referenced standards: The standards referenced in this code shall be considered part of the requirements of this code to the prescribed extent of each such reference. Where differences occur between the provisions of this code and referenced standards, the provisions of this code shall apply.