Section 445A.6713 - Distribution system: Isolation valves1. Water mains must contain sufficient isolation valves to minimize any inconvenience to customers and sanitary hazards resulting from repairs.2. Except as otherwise provided in subsection 3, isolation valves in:(a) Commercial districts must be located at intervals of not more than 500 feet;(b) Areas where users of water are widely scattered and future development is not expected must be located at intervals of not more than 1 mile; or(c) Other areas must be located in such a manner that portions of water mains can be isolated in lengths of 800 feet or less by the closure of valves.3. A supplier of water shall, after consultation with the fire authority, locate isolation valves in such a manner as to minimize the number of fire hydrants that will be taken out of service by the isolation of particular portions of a water main.4. Valve boxes must be installed over all valve stems in a manner that aids in locating and operating the valves.5. Each service line must have at least: (a) One corporation stop; and(b) One curb stop or meter stop.Nev. Admin. Code § 445A.6713
Added to NAC by Bd. of Health, eff. 2-20-97