7.4.7.2.Size and Spacing of Cleanouts

(1) Except as provided in Sentences (2), (3) and 7.4.7.1.(6), the nominal pipe size and spacing of cleanouts in nominally horizontal pipes of a drainage system shall conform to Table 7.4.7.2. Table 7.4.7.2. Permitted Size and Spacing of Cleanouts Forming Part of Sentence 7.4.7.2.(1) Nominal Pipe Size of Minimum Nominal Pipe Size of Maximum Spacing, m Drainage Pipe, NPS Cleanout, NPS One-Way Rodding Two-Way Rodding less than 3 Same NPS as drainage pipe 7.5 15 3 and 4 3 15 30 over 4 4 26 52 (2) The spacing between manholes serving a building sewer (a) of NPS 24 or less shall not exceed 90 m, and (b) over NPS 24 shall not exceed 150 m. (3) The developed length of a building sewer between the building and the first manhole to which the building sewer connects shall not exceed 75 m. (4) Where a building sewer connects to another building sewer other than by a manhole, the developed length between the building and the building sewer to which it connects shall not exceed 30 m. (5) Cleanouts that allow rodding in one direction only shall be installed to permit rodding in the direction of flow. (6) Manholes shall be located at all junctions and all changes in grade, size or alignment (except for curvilinear alignment) on a sanitary building sewer that is NPS 8 or larger. (7) Manholes shall be located at changes of grade, size or alignment (except for curvilinear alignment) on a storm building sewer or exterior storm drainage pipe that is NPS 8 or larger.