18-29-704 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.

Table 18-29-704.1
Slope of Horizontal Drainage Pipe

 

Size (inches)	Minimum Slope (inch per foot)
2 1/2 or less	1/4
3 to 6	1/8
8 or larger	1/16

 

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 Reserved.

Editor's note – Coun. J. 10-14-21, p. 37722, Art. VII, § 4, repealed § 18-29-704.5, which pertained to dead ends.

18-29-704.5.1 Reserved.

Editor's note – Coun. J. 10-14-21, p. 37722, Art. VII, § 4, repealed § 18-29-704.5.1, which pertained to freezing.