Nevada Administrative Code

NAC 445A.65615 “Backsiphonage” defined. (NRS 445A.860) “Backsiphonage” means a backflow that results when a reduction in the pressure of a water system causes a subatmospheric pressure to exist at a particular site in the water system. (Added to NAC by Bd. of Health, eff. 2-20-97…

NAC 445A.6562 “Backwashing” defined. (NRS 445A.860) “Backwashing” means the reversal of flow through a filter to wash clogging material out of the filtering medium and reduce conditions that cause head loss. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65625 “Baffles” defined. (NRS 445A.860) “Baffles” means deflective valves, guides, grids or gratings, or similar devices, which are constructed or placed in flowing water to check or effect a more uniform distribution of velocities, to absorb energy, to divert, guide or …

NAC 445A.6563 “Bag of cement” defined. (NRS 445A.860) “Bag of cement” means 1 cubic foot or 94 pounds of cement. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65635 “Ball valve” defined. (NRS 445A.860) “Ball valve” means a valve that consists of a ball resting in a cylindrical seat, regarding which: 1. A hole is bored through the ball to allow the flow of water when the valve is open; and 2. The valve closes when the ball is r…

NAC 445A.6564 “Bell-shaped” defined. (NRS 445A.860) “Bell-shaped” means having an expanding rounded entrance. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65645 “Best available technology” defined. (NRS 445A.860) “Best available technology” means the best technology, technique or procedure that the EPA finds to be available after an examination of the efficacy of the technology, technique or procedure under conditions both…

NAC 445A.6565 “Blowoff valve” defined. (NRS 445A.860) “Blowoff valve” means a valve installed at a low point, depression or end of a pipeline to allow drainage of the pipeline. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65655 “Booster pump” defined. (NRS 445A.860) “Booster pump” means a pump installed on a distribution main to raise the pressure of the water on the discharge side of the pump. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6566 “Butterfly valve” defined. (NRS 445A.860) “Butterfly valve” means a valve in which a disc rotates in such a manner on a shaft that as it opens and closes, the valve is fully open when the disc is parallel to the axis of the pipe. (Added to NAC by Bd. of Health, eff.…

NAC 445A.65665 “Capacity for the development and treatment of water” defined. (NRS 445A.860) “Capacity for the development and treatment of water” means the facilities and appurtenances of a public water system that provide finished water, treated if necessary, to the distributio…

NAC 445A.6567 “Casing” defined. (NRS 445A.860) “Casing” means: 1. The conduit required to prevent waste and contamination of groundwater and to hold the formation open during the construction or use of a well; or 2. The enclosure surrounding an impeller, into which the suction an…

NAC 445A.65675 “Cement grout” defined. (NRS 445A.860) “Cement grout” means a mixture of portland cement, sand and water which contains at least seven bags of cement per cubic yard and not more than 7 gallons of clean water for each bag of cement. (Added to NAC by Bd. of Health, e…

NAC 445A.6568 “Cement slurry” defined. (NRS 445A.860) “Cement slurry” means a mixture of cement and sand, without aggregate, that: 1. Has a cured compressive strength of 300 psi; 2. Can be excavated with minimal difficulty; and 3. Can provide a uniform support for pipes and backf…

NAC 445A.65685 “Centrifugal pump” defined. (NRS 445A.860) “Centrifugal pump” means a pump that consists of an impeller which: 1. Is fixed on a rotating shaft and enclosed in a casing that includes an inlet and a connection for discharge; and 2. When rotating, creates pressure in …

NAC 445A.6569 “Certified backflow prevention assembly tester” defined. (NRS 445A.860) “Certified backflow prevention assembly tester” means a person who is certified to test assemblies for the prevention of backflow by the California/Nevada section of the American Water Works Ass…

NAC 445A.65695 “Check valve” defined. (NRS 445A.860) “Check valve” means a valve designed to open in the direction of normal flow and close with the reversal of normal flow. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65705 “Chloramines” defined. (NRS 445A.860) “Chloramines” means compounds of organic and inorganic nitrogen and chlorine. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6571 “Chlorination” defined. (NRS 445A.860) “Chlorination” means the process of adding chlorine to water to: 1. Kill or inactivate organisms that cause disease; or 2. Act as an oxidizing agent. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65715 “Chlorinator” defined. (NRS 445A.860) “Chlorinator” means a device used to add chlorine, or a compound that contains chlorine, to water. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6572 “Chlorine residual” defined. (NRS 445A.860) “Chlorine residual” means the amount of chlorine remaining in water after the reaction of the chlorine with organic and inorganic substances in the water which, depending upon the pH of the water, is in the form of hypochl…

NAC 445A.65725 “Class 1 fire sprinkler system” defined. (NRS 445A.860) “Class 1 fire sprinkler system” means a fire sprinkler system that: 1. Has a direct connection to a water main and no physical connection to any source of pollution or contamination; 2. Uses no pumps, tanks or…

NAC 445A.6573 “Class 2 fire sprinkler system” defined. (NRS 445A.860) “Class 2 fire sprinkler system” means a fire sprinkler system that: 1. Has a direct connection to a water main and no physical connection to any source of pollution or contamination; 2. Has a booster pump insta…

NAC 445A.65735 “Class 3 fire sprinkler system” defined. (NRS 445A.860) “Class 3 fire sprinkler system” means a fire sprinkler system that: 1. Has a direct connection to a water main; 2. Uses no antifreeze or other additives of any kind; and 3. Uses one or more of the following: (…

NAC 445A.6574 “Class 4 fire sprinkler system” defined. (NRS 445A.860) “Class 4 fire sprinkler system” means a fire sprinkler system that: 1. Has a direct connection to a water main; 2. Has available an auxiliary supply of water which is located on the premises or within 1,700 fee…

NAC 445A.65745 “Class 5 fire sprinkler system” defined. (NRS 445A.860) “Class 5 fire sprinkler system” means a fire sprinkler system that has a direct connection to a water main and: 1. An interconnection with an auxiliary supply of water, including, without limitation: (a) A pro…

NAC 445A.6575 “Class 6 fire sprinkler system” defined. (NRS 445A.860) “Class 6 fire sprinkler system” means a fire sprinkler system that: 1. Is combined with a water system used for industrial purposes; and 2. Has a direct connection to a water main and no physical connection to …

NAC 445A.65755 “Clear well” defined. (NRS 445A.860) “Clear well” means a structure, vault or chamber used for the storage of finished water. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6576 “Coating” defined. (NRS 445A.860) “Coating” means a material applied to the inside or outside of a pipe, valve, fixture, tank or other structure, primarily for protection from corrosion. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65765 “Coliform bacteria” defined. (NRS 445A.860) “Coliform bacteria” means a group of bacteria that inhabits the intestines of humans and animals, and is occasionally found in other habitats, including: 1. All aerobic and facultative anaerobic, Gram-negative bacilli tha…

NAC 445A.65767 “Commission” defined. (NRS 445A.860) “Commission” has the meaning ascribed to it in NRS 445A.8075. (Added to NAC by Environmental Comm’n by R194-08, eff. 10-27-2009)

NAC 445A.6577 “Commitment for water service” defined. (NRS 445A.860) “Commitment for water service” means a document pursuant to which a supplier of water acknowledges that it has assumed a legal obligation to supply water to property under development or proposed to be developed…

NAC 445A.65775 “Concentric reducer” defined. (NRS 445A.860) “Concentric reducer” means a reducer used to connect a larger pipe to a smaller pipe in such a manner as to align the center lines of both pipes. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6578 “Concrete grout” defined. (NRS 445A.860) “Concrete grout” means a mixture of portland cement, sand, 1/4-inch minus aggregate and water which contains at least five bags of cement per cubic yard of concrete and not more than 7 gallons of clean water for each bag of c…

NAC 445A.65785 “Conductor casing” defined. (NRS 445A.860) “Conductor casing” means the temporary or permanent casing used in the upper portion of a drill hole to prevent collapse of the formation during the construction of a well or to conduct the gravel pack to perforated or scr…

NAC 445A.6579 “Constant discharge aquifer test” defined. (NRS 445A.860) “Constant discharge aquifer test” means a scientific evaluation of the characteristics of performance of a well and the hydraulic parameters of the aquifer by pumping the well at a specific rate for a signifi…

NAC 445A.65795 “Contamination” defined. (NRS 445A.860) “Contamination” means an impairment of water quality by chemical substances or biological organisms which the Division or the appropriate district board of health determines to be sufficient to create a risk or threat to the …

NAC 445A.65805 “Corporation stop” defined. (NRS 445A.860) “Corporation stop” means a valve, which cannot be operated from the surface, for joining a service line to a water main. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6581 “Cross-connection” defined. (NRS 445A.860) “Cross-connection” means an unprotected connection or structural arrangement, whether actual or potential, between a public water system and any other source or system, through which it is possible to introduce into any par…

NAC 445A.65815 “Curb stop” defined. (NRS 445A.860) “Curb stop” means a valve that is attached to a service line and can be operated by a valve key to start or stop the flow of water. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6582 “Dead end” defined. (NRS 445A.860) “Dead end” means the end of a water main which is not connected to other parts of the distribution system by means of a connecting loop. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65825 “Determined to be compatible with drinking water” defined. (NRS 445A.860) “Determined to be compatible with drinking water” means that a product is determined to be compatible with drinking water through: 1. Certification of the product in accordance with Standard …

NAC 445A.6583 “Disinfection” defined. (NRS 445A.860) “Disinfection” means: 1. The introduction of chlorine or another chemical oxidant, or of another agent approved by the Division or the appropriate district board of health, in such a concentration and for such a period of conta…

NAC 445A.65835 “Distribution main” defined. (NRS 445A.860) “Distribution main” means any pipe in a distribution system other than a service line. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6584 “Distribution storage” defined. (NRS 445A.860) “Distribution storage” means the storage structures connected to a distribution system. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65845 “Distribution system” defined. (NRS 445A.860) “Distribution system” means all the facilities of a public water system used to deliver finished water to service connections from the source of the water or from any related treatment or storage facilities. (Added to N…

NAC 445A.65847 “District board of health” defined. (NRS 445A.860) “District board of health” has the meaning ascribed to it in NRS 445A.812. (Added to NAC by Environmental Comm’n by R194-08, eff. 10-27-2009)