Plans shall be filed with and approved by the Department (as a Plumbing Plan Check) before any permit is issued for work listed below:

• Drainage systems.
• Drainage and vent systems for a building or structure involving fixtures that discharge 217 or more drainage fixture units.
• Drainage pumps and ejectors.
• Combination waste and vent systems.
• Fuel gas piping with any of the following:
• Systems having more than 10 outlets.
• Medium pressure gas systems.
• High pressure gas systems.
• Methane gas extraction systems.
• Potable water piping with any of the following:
• Systems requiring a 2-inch or larger supply.
• Systems designed from the procedure in Section 610.5 of the Uniform Plumbing Code.
• Exception: Plan check is not required for existing systems, that are added to or altered, with branch lines that serve less than 20 fixture units and sized by Table 6-4.
• Rainwater piping systems with more than 10 interconnected rainwater or overflow drains, or a rainwater pump.
• Special water piping systems for reclaimed water piping.
• Lawn sprinkler systems required for irrigation of cut-and-fill slopes in hillside areas.
• Subsurface drainage piping.
• Swimming pool circulating water systems.