NAC445A.67155. Separation of lines: Sewer main parallel to water main or water service lateral.

If a sewer main parallels a water main or water service lateral:

     1. Whenever possible, the sewer main must be located lower than the water main or water service lateral.

     2. Except as otherwise provided in subsection 3, the sewer main must be in a separate trench and:

     (a) Located at least 10 feet away from the water main or water service lateral, as measured horizontally from the exterior walls of the pipes;

     (b) If compliance with paragraph (a) is not practicable, located:

          (1) At least 5 feet away from the water main or water service lateral, as measured horizontally from the exterior walls of the pipes; and

          (2) At least 18 inches lower than the water main or water service lateral, as measured vertically from the exterior walls of the pipes; or

     (c) If compliance with neither paragraph (a) nor paragraph (b) is practicable, located at least 6 feet away from the water main or water service lateral, as measured horizontally from the exterior walls of the pipes. If the sewer main:

          (1) Is in place at the time a water project is performed, the sewer main must, except as otherwise provided in subparagraph (3), be totally encased in at least 4 inches of cement slurry;

          (2) Is not in place at the time a water project is performed, the sewer main must, except as otherwise provided in subparagraph (3), be constructed of PVC with joints that comply with Standard D3212 of the American Society for Testing and Materials; or

          (3) Is part of a storm sewer and has a diameter of not less than 24 inches, the sewer main must be installed with watertight joints that use joint sealants or joint gaskets.

     3. If compliance with the requirements for separation set forth in subsection 2 are not practicable:

     (a) The water main or water service lateral must be encased in at least 4 inches of cement slurry; and

     (b) The sewer main must comply with the requirements of subparagraphs (1), (2) and (3) of paragraph (c) of subsection 2.

     (Added to NAC by Bd. of Health, eff. 2-20-97)