Pipe, tube, and fittings conveying indirect waste shall be of such materials and design as to perform
their intended function to the satisfaction of the Authority
Having Jurisdiction.
Joints and connections
in copper and copper alloy pipe and tube shall be installed
in accordance with Section 705.3.
Except as hereinafter provided, the size of indirect waste piping shall be in accordance with other sections of this code applicable to
drainage and vent piping. No vent from indirect waste
piping shall combine with a sewer-connected vent, but shall
extend separately to the outside air. Indirect waste pipes
exceeding 5 feet (1524 mm), but less than 15 feet (4572
mm) in length shall be directly trapped, but such traps need
not be vented.
Indirect waste pipes less than 15 feet (4572 mm) in length shall be not less than the diameter of the drain outlet or tailpiece of the fixture, appliance, or equipment served, and in no case less than 1/2 of an inch (15 mm). Angles and changes of direction in such indirect waste pipes shall be provided with cleanouts so as to permit flushing and cleaning.
Indirect waste pipes less than 15 feet (4572 mm) in length shall be not less than the diameter of the drain outlet or tailpiece of the fixture, appliance, or equipment served, and in no case less than 1/2 of an inch (15 mm). Angles and changes of direction in such indirect waste pipes shall be provided with cleanouts so as to permit flushing and cleaning.