Installation of domestic garbage grinders shall be permitted when the drainage system is connected to a City sewer or to sewers which are so arranged as to discharge into a sewage treatment plant. Connection of commercial garbage grinders to a combination sewer leading to a sewage treatment plant is permitted. When such public sewers are unavailable, domestic and commercial garbage grinder drainage shall be in accordance with Chapter 14.
The efflux from a domestic grinder shall be carried off through a trap and waste pipe with a minimum inside diameter of 1-1/2 inches. The efflux from a commercial grinder shall be carried off through a trap and waste pipe with a minimum inside diameter of 2 inches. The waste pipe from a commercial garbage grinder shall not exceed 12 feet in length from a vented soil or waste connection. Garbage grinders shall not be installed on a waste line where an interceptor is required by Section P-510.1.
For both domestic and commercial garbage grinders, the model number and manufacturer’s name shall be permanently identified by a nameplate or by an indented marking on each grinder installed.