7.4.7.1.Cleanouts for Drainage Systems

(1) Sanitary drainage systems and storm drainage systems shall be provided with cleanouts that will permit cleaning of the entire system. (See Note A-7.4.7.1.(1)) (2) A cleanout fitting shall be provided on the upstream side and directly over every running trap. (3) Interior leaders shall be provided with a cleanout fitting at the bottom of the leader or not more than 1 m upstream from the bottom of the leader. (4) Where a cleanout is required on a building sewer of NPS 8 or larger, it shall be a manhole. (5) A building sewer shall not change direction or slope between the building and public sewer or between cleanouts, except that pipes not more than NPS 6 may change direction (a) by not more than 5° every 3 m, or (b) by the use of fittings with a cumulative change in direction of not more than 45°. (6) Building drains shall be provided with a cleanout fitting of NPS 4 or larger that is located as close as practical to the place where the building drain leaves the building. (See Note A-7.4.7.1.(6)) (7) Stacks shall be provided with a cleanout fitting (a) at the bottom of the stack, (b) not more than 3 m upstream of the bottom of the stack, or (c) on a Y fitting connecting the stack to the building drain or branch. (8) A cleanout shall be provided to permit the cleaning of the piping immediately downstream of an interceptor. (9) Every indirect drainage pipe carrying waste from a food receptacle shall have a cleanout access at every change of direction of more than 45°. (10) A cleanout shall be installed on a trap arm serving a kitchen sink as close as practical to the trap outlet and shall be readily accessible.