NAC445A.67115. Distribution system: Design; diameter of water mains; connection to fire hydrant.

     1. Before designing a water main for a public water system, an engineer shall perform a network hydraulic analysis on the public water system, based upon the requirements for flow and pressure set forth in NAC 445A.6672 to 445A.66735, inclusive, and 445A.6711.

     2. Except as otherwise authorized by the Division or the appropriate district board of health on a case-by-case basis, the inside diameter of the water mains of a public water system must have a nominal size of at least 6 inches.

     3. A water service lateral that serves a fire hydrant must, if the water service lateral is:

     (a) Not more than 150 feet in length, be not less than 6 inches in diameter.

     (b) More than 150 feet in length, be of a diameter that is justified by an engineer and approved by the Division or the appropriate district board of health.

Ê A fire hydrant must not be connected to a water main or water service lateral that does not have a sufficient capacity for fire flow.

     4. A distribution system for mobile home parks and recreational vehicle parks must be designed in compliance with the Uniform Plumbing Code, as adopted by reference in NAC 445A.6663.

     (Added to NAC by Bd. of Health, eff. 2-20-97; A by Environmental Comm’n by R194-08, 10-27-2009)