Drainage Piping and Installation.
§ 18-29-704.1 Slope of horizontal drainage piping.
Horizontal drainage piping shall be installed in uniform alignment at uniform slopes. The minimum slope of a horizontal drainage pipe shall be in accordance with Table§ 18-29-704.1.
§ 18-29-704.2 Change in size.
The size of the drainage piping shall not be reduced in size in the direction of the flow. A 4-inch by 3-inch (100 mm by 75 mm) water closet connection shall not be considered as a reduction in size.
§ 18-29-704.3 Connections to offsets and bases of stacks.
Horizontal branches shall connect to the bases of stacks at a point located not less than 10 pipe diameters downstream from the stack. Except as prohibited by Section § 18-29-711.2, horizontal branches shall connect to horizontal stack offsets at a point located not less than 10 pipe diameters downstream from the upper stack.
§ 18-29-704.4 Future fixtures.
Drainage piping for future fixtures shall terminate with an approved cap or plug.
§ 18-29-704.5 Dead ends.
In the installation or removal of any part of a drainage system, dead ends shall be prohibited. Cleanout extensions and approved future fixture drainage piping shall not be considered as dead ends.
§ 18-29-704.5.1 Freezing.
No soil or waste pipe shall be installed or permitted outside of a building or in an exterior wall unless provisions are made to protect such piping from freezing. This does not prohibit a soil or waste pipe from extending from a manufactured or mobile home unit to an approved point of discharge, provided such waste line is protected from freezing.