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| The following excerpts from the National Plumbing Code
concerning minimum cleanout requirements are listed for reference, but
clarification and enlargement in specifications is recommended. Location: Cleanouts shall be not more than fifty feet apart in horizontal drainage lines of four inch nominal diameter or less, and not more than 100 feet apart for larger pipes. Change of direction: Cleanouts shall be installed at each change of direction of the building drain greater than 450 Base of stacks: A cleanout shall be provided at or near the foot of each vertical waste or soil stack. For buildings with a floor slab on fill or ground, or with less than 18- inch crawl space under the floor, the following will be acceptable instead of a cleanout at the base of the stack. The building drain may be extended to the outside of the building and terminated in an accessible cleanout, or an accessible cleanout installed in the building drain downstream from the stack not more than five feet outside the building wall. Base of stacks: A cleanout shall be provided at or near the foot of each vertical waste or soil stack. For buildings with a floor slab on fill or ground, or with less than 18- inch crawl space under the floor, the following will be acceptable instead of a cleanout at the base of the stack. The building drain may be extended to the outside of the building and terminated in an accessible cleanout, or an accessible cleanout installed in the building drain downstream from the stack not more than five feet outside the building wall. Large pipes: For underground piping over ten inches, manholes shall be provided and located at each 900 change in direction, and at intervals of not more than 150 feet. Underground drainage: Cleanouts, when installed on an underground drain, shall be extended to or above the finished grade level directly above the place where the cleanout is installed. Concealed piping: Cleanouts on concealed piping shall be extended through and terminate flush with the finished wall or floor Size of Cleanouts Small pipes: Cleanouts shall be of the same nominal size as the pipes up to four inches, and not less than four inches for larger piping. Large pipes: For underground piping over ten inches, manholes shall be provided and located at each 900 change in direction, and at intervals of not more than 150 feet. Cleanout Clearances Small pipes: Cleanouts smaller than three inches shall be installed with a 12-inch clearance for rodding. Cleanout Clearances Small pipes: Cleanouts smaller than three inches shall be installed with a 12-inch clearance for rodding. Large Pipes: Cleanouts on three inch or larger pipes shall be installed with a clearance of not less than 1 8-inches for rodding. Caulking: Cement, plaster or any other permanent finishing material shall not be placed over a cleanout plug. Concealment: Where it is necessary to conceal a cleanout plug, a covering plate or access door shall be provided which will permit ready access to the plug. The above excerpts cover only minimum requirements. For improved cleanout installations the following suggestions are submitted. Caulking: Cement, plaster or any other permanent finishing material shall not be placed over a cleanout plug. Concealment: Where it is necessary to conceal a cleanout plug, a covering plate or access door shall be provided which will permit ready access to the plug. The above excerpts cover only minimum requirements. For improved cleanout installations the following suggestions are submitted. Unfinished floor areas: Floor cleanouts shall have a cast iron cover and be designed sufficiently strong for the traffic expected. Finished floor areas: Consideration should be give to the type and pattern of the finished floor area. Round cleanout covers are recommended for terrazzo floor and square covers for tile floors. Non-ferrous covers and frames of nickel bronze should be used to give the floor area a finished appearance. Unfinished floor areas: Floor cleanouts shall have a cast iron cover and be designed sufficiently strong for the traffic expected. Finished floor areas: Consideration should be give to the type and pattern of the finished floor area. Round cleanout covers are recommended for terrazzo floor and square covers for tile floors. Non-ferrous covers and frames of nickel bronze should be used to give the floor area a finished appearance. Finished walls: Cleanouts in or behind walls should have an access cover and frame embedded flush with the finished wall. The cover shall be smooth nickel bronze of ample size to provide a clear access to the cleanout. Vandalism: Access and cleanout cover should be secured with vandal-proof screws where these units are accessible and apt to be removed. Vandalism: Access and cleanout cover should be secured with vandal-proof screws where these units are accessible and apt to be removed. |
Tyler Pipe/Wade Division - P.O. Box 2027 -Tyler, TX 75710-2027 - Voice: (903) 882-5511 - Fax: (888) 879-9233 |