Installation

(a) Minimum fall. The following minimum fall requirements shall be met: (1) Three-inch and four-inch pipe. Pipe having a diameter of three inches (3") or four inches (4") that delivers sewage to a septic tank or a trash tank shall be installed with a minimum fall of one-eighth inch (1/8") per foot. (2) Six-inch pipe. Pipe having a diameter of six inches (6") that delivers sewage to a septic tank or a trash tank shall be installed with a minimum fall of one-sixteenth inch (1/16") per foot. (b) Cleanouts. For all pipe located upstream of a septic tank, a two-way cleanout or two-way cleanout assembly shall be installed: (1) Within five feet (5') from where the plumbing stubs out of the building or appurtenance to the building; (2) Within five feet (5') after each of a change in direction of more than forty-five degrees (45). Where more than one change of direction greater than forty-five degrees (45) occurs within forty (40) feet of pipe, the cleanout for the first change of direction shall serve as the cleanout for all changes in direction within that forty (40) feet of piping; (3) For each one-hundred-foot interval of straight pipe. Nothing in this paragraph shall require the installation of more than one (1) two-way cleanout or two-way cleanout assembly per one-hundred-foot (100') section of straight pipe. For purposes of this paragraph, straight pipe is pipe that does not have any change of direction of more than forty-five degrees (45). SUBCHAPTER 7. SEPTIC TANKS