The size and slope of the building sewer shall be subject to the approval of the Inspector, but in no event shall the diameter be less than four (4) inches. Minimum grade shall be as follows:
(a) Residential Installation:
6-inch pipe - 1/8" per foot or 1" per 8 feet (1%)
4-inch pipe - 1/4" per foot or 2" per 8 feet (2%)
(b) Commercial Installation: 6-inch pipe - .72" per 8 feet (.75%) or 1.5" per 16 feet.
(Ord. 2009-02. Passed 5-11-09.)