Drainage piping shall be provided with
approved inlet fittings for fixture connections, correctly
located according to the size and type of fixture proposed to
be connected.
Two fixtures set
back-to-back, or side-by-side, within the distance allowed
between a trap and its vent, shall be permitted to be served by
a single vertical drainage pipe provided that each fixture
wastes separately into an approved double-fixture fitting having
inlet openings at the same level.
Pot sinks, scullery sinks, dishwashing
sinks, silverware sinks, and other similar fixtures
shall be connected directly to the drainage system. A floor
drain shall be provided adjacent to the fixture, and the fixture
shall be connected on the sewer side of the floor drain trap,
provided that no other drainage line is connected between the
floor drain waste connection and the fixture drain. The fixture
and floor drain shall be trapped and vented in accordance
with this code.