13.20.400 Additional requirements for drop boxes, distribution boxes, or valve boxes.
This section is included in your selections.
If drop boxes, distribution boxes, or valve boxes are used, items A. to D. apply:
A. The invert of the outlet pipe to the next drop box shall be no greater than 2 inches higher than the crown of the outlet pipe of the trench in which the box is located;
B. The box shall be covered by a minimum of 6 inches of soil. If the top of the box is deeper than 6 inches, access must be provided above, at or within 6 inches of finished grade;
C. The box shall be placed on firm and settled soil; and
D. Distribution boxes must not be connected to one another if each box has distribution pipes.