In general, "Graywater Ready Systems" shall be provided for all building plans submitted after June 6, 2016.

Combination Waste and Vent Systems are permitted when structural conditions prevents the use or conventional waste system.

The acceptable pipe material for subsoil drain are listed in table 1102.5 of LAPC. Acceptable pipe material are Asbestos Cement, PE, PVC, and Clay.

Plumbing plan check is required only for swimming pools installed in apartment buildings or commercial building and it is not required for single family dwelling units.

Yes, plan check is required for sewage ejector per Section 101.5.6 of the Los Angeles Plumbing Code (LAPC).

Systems up to 10 interconnected roof drains do not require plan check.

No plan check is required for rain gutters.

Plan check for sewer piping is not required when the drainage fixture units do not exceed 216 fixture units and pumps are not used.

Plan check is not required for a 2-inch or less water service when the potable water piping is sized using table 610.4 of the Los Angeles Plumbing Code.

Plan check is not required for existing systems that are added added or altered with branch lines serving less than 20 fixture units and sized per table 610.4.