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(A) The building sewer shall have a minimum fall of 1/4-inch per linear foot of sewer from the building to the public sewer. The City Engineer, by special permission in each case, may authorize the building sewer to be constructed with a fall as little as 1/8-inch per linear foot if he or she determines such procedure to be necessary. The junction between the building sewer and the house plumbing shall be made watertight.
(B) The interior of each length of pipe shall be made perfectly clean and free from offsets, fins and projections before the next length is connected thereto. All building sewers shall be graded by line and pole, the line being first leveled from the building to the public sewer and then lowered at the downstream end to obtain the required fall.
(Ord. 1049, passed 8-13-63)