The minimum vertical distance from the bottom of water pipes to the top of sewer or drain pipe if laid in the same trench on top of the other.

Vertical flow of air used to separate different functions of spaces.

How many days, at least, shall be given before any plumbing work inspection is done after written notice for inspection?

A term applied to the interconnection of the same fixtures in one soil or waste branch with one branch vent.

Minimum wire size in square millimeter for a branch circuit with a 30-ampere rating using Type THW stranded copper conductor in a raceway.

A vent pipe connected to a vent stack.  

The minimum size of trap and waste branch for a pedestal urinal.

Minimum lead content in percent for pipes and fittings safe for humans.

The overhead service conductors from the last pole or other aerial support to and including splices, if any, connecting to the service entrance conductors at the building.