CHAPTER 445A - WATER CONTROLS

NAC 445A.65905 “EPA” defined. (NRS 445A.860) “EPA” means the United States Environmental Protection Agency. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6591 “Existing public water system” defined. (NRS 445A.860) “Existing public water system” means a public water system that has operated for 5 or more years. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65915 “Filtration” defined. (NRS 445A.860) “Filtration” means a process for removing particulate matter from water by passing the water through porous media. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6592 “Final map” defined. (NRS 445A.860) “Final map” has the meaning ascribed to it in NRS 278.0145. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65925 “Finished water” defined. (NRS 445A.860) “Finished water” means water that has been treated or otherwise developed in a manner that complies with NAC 445A.450 to 445A.540, inclusive, and 445A.65505 to 445A.6731, inclusive. (Added to NAC by Bd. of Health, eff. 2-20-…

NAC 445A.6593 “Fire authority” defined. (NRS 445A.860) “Fire authority” means: 1. The county, city, town, special district or agency responsible for fire protection in the area of service of a public water system; or 2. The Office of the State Fire Marshal Division of the Departm…

NAC 445A.65935 “Fire demand” defined. (NRS 445A.860) “Fire demand” means the total quantity of water required for protection from fire, as determined by the fire authority and expressed in gallons per minute for a specified number of hours. (Added to NAC by Bd. of Health, eff. 2-…

NAC 445A.6594 “Fire flow” defined. (NRS 445A.860) “Fire flow” means the rate of the flow of water, as determined by the fire authority and expressed in gallons per minute, which: 1. Is required for protection from fire; and 2. Can be delivered from a distribution system at a resi…

NAC 445A.65945 “Fire sprinkler system” defined. (NRS 445A.860) “Fire sprinkler system” means a system of piping which is connected to a public water system and has sprinklers that automatically discharge water over the area of a fire. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6595 “Flapper valve” defined. (NRS 445A.860) “Flapper valve” means a formed or machined covering for the opening at the end of a pipeline that: 1. Is suspended from the top of the pipe; and 2. Opens and closes by rotating about a hinge in a manner that allows the valve t…

NAC 445A.65955 “Flexible coupling” defined. (NRS 445A.860) “Flexible coupling” means a joint between two pipes that allows one of the pipes to be deflected without disturbing the other pipe. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6596 “Flocculation” defined. (NRS 445A.860) “Flocculation” means a process to enhance agglomeration or the collection of smaller floc particles into larger particles that are more settleable or filterable using gentle stirring by hydraulic or mechanical means. (Added to …

NAC 445A.65965 “Flow detector” defined. (NRS 445A.860) “Flow detector” means a device inserted through a coupling placed on the line into the suction side of a pump to shut down the pump when flow is lost, in which a metal reed extends into the flow and the flow causes the reed t…

NAC 445A.6597 “Flow proportional control” defined. (NRS 445A.860) “Flow proportional control” means an automatic method of chlorination or similar disinfection pursuant to which the rate for the feeding of disinfectant is increased or decreased as the rate of the flow of water in…

NAC 445A.65975 “Fluoridation” defined. (NRS 445A.860) “Fluoridation” means the process for the treatment of water pursuant to which a chemical is added to the water to increase the concentration of fluoride ions to an optimal level for reducing the incidence of dental caries. (Ad…

NAC 445A.6598 “Foot valve” defined. (NRS 445A.860) “Foot valve” means a check valve that: 1. Is placed at the bottom of the suction pipe of a pump; 2. Opens to allow the entry of water into the suction pipe; and 3. Closes to prevent water from passing out through the bottom of th…

NAC 445A.65985 “Gate valve” defined. (NRS 445A.860) “Gate valve” means a valve in which a disc slides across an opening to stop the flow of water. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6599 “Globe valve” defined. (NRS 445A.860) “Globe valve” means a valve with a round, ball-like shell and a horizontal disc. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.65995 “Gravel pack” defined. (NRS 445A.860) “Gravel pack” means gravel or other permeable filtering materials placed in the annular space around the casing of a well. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66005 “Gravity sanitary sewer” defined. (NRS 445A.860) “Gravity sanitary sewer” means a sanitary sewer designed and constructed in such a manner as to allow wastewater to flow exclusively under the influence of gravity. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6601 “Gravity storm sewer” defined. (NRS 445A.860) “Gravity storm sewer” means a storm sewer designed and constructed in such a manner as to allow drainage to flow exclusively under the influence of gravity. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66015 “Grid system” defined. (NRS 445A.860) “Grid system” means a layout for a distribution system in which all ends of the water mains are connected to eliminate dead ends. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6602 “Ground-level tank” defined. (NRS 445A.860) “Ground-level tank” means a storage tank installed in such a manner that the bottom of the tank is at or below the surface of the ground. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66025 “Groundwater” defined. (NRS 445A.860) “Groundwater” means the subsurface water in the zone of saturation. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6603 “Groundwater under the direct influence of surface water” defined. (NRS 445A.860) “Groundwater under the direct influence of surface water” means any water beneath the surface of the ground that the Division or the appropriate district board of health has determined…

NAC 445A.66035 “Grouting” defined. (NRS 445A.860) “Grouting” means the operation by which grout is placed between the casing and sides of a well bore to secure the casing in place and to exclude water and other fluids from the well bore. (Added to NAC by Bd. of Health, eff. 2-20-…

NAC 445A.6604 “Head” defined. (NRS 445A.860) “Head” means the measure of the pressure of water. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66045 “Head loss” defined. (NRS 445A.860) “Head loss” means the loss of head as a result of friction. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6605 “Header” defined. (NRS 445A.860) “Header” means a pipe fitting with several branches for the conveyance of water from a larger pipe to several smaller pipes. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66055 “Health authority” defined. (NRS 445A.860) “Health authority” means the officers and agents of the district board of health of the health district in which the area of service of a public water system is located or, if none, the officers and agents of the Division …

NAC 445A.66065 “Hydropneumatic system” defined. (NRS 445A.860) “Hydropneumatic system” means a system pursuant to which an airtight tank, in which air is compressed over water, is used to impart pressure to the water in the tank and to attached pipelines for the distribution of t…

NAC 445A.6607 “Impeller” defined. (NRS 445A.860) “Impeller” means a rotating set of vanes in a pump designed to impart rotation and energy to a mass of fluid. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66075 “Isolation valve” defined. (NRS 445A.860) “Isolation valve” means a valve, including a ball valve, butterfly valve, gate valve, globe valve or other type of valve, installed in a pipeline to shut off the flow of water in a portion of the pipeline for the purpose of…

NAC 445A.6608 “Jetted water well” defined. (NRS 445A.860) “Jetted water well” means a water well in which the excavation of the drill hole is done primarily by using a high-velocity jet of fluid or gas. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66085 “Lead-free” defined. (NRS 445A.860) “Lead-free” means, with regard to: 1. Solder and flux, that not more than 0.2 percent of the composition of the solder or flux is lead. 2. Pipes, fittings and fixtures, that: (a) Not more than a weighted average of 0.25 percent o…

NAC 445A.6609 “Lineshaft turbine pump” defined. (NRS 445A.860) “Lineshaft turbine pump” means a type of vertical turbine in which: 1. A motor is mounted above the ground and a pumping device is mounted below the surface of the water; 2. A column extends from the pumping device to…

NAC 445A.66095 “Lining” defined. (NRS 445A.860) “Lining” means a protective covering that is placed over all or part of the perimeter, top or bottom of a reservoir in such a manner as is necessary to prevent losses due to seepage, withstand pressure, resist erosion and control th…

NAC 445A.66105 “Manual of operations and maintenance” defined. (NRS 445A.860) “Manual of operations and maintenance” means an operating guide for the use of personnel who operate and maintain a public water system which is written in such a manner as: 1. Primarily to: (a) Explain…

NAC 445A.6611 “Maximum day demand” defined. (NRS 445A.860) “Maximum day demand” means the maximum daily demand for water over a yearly period, as determined by historical data. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66115 “Mechanical joint” defined. (NRS 445A.860) “Mechanical joint” means a pipe joint that uses a combination of bolts, flanges, gaskets, locking rings or tapered glands to ensure secure restraint. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6612 “Mechanical seal” defined. (NRS 445A.860) “Mechanical seal” means a mechanical device used to control leakage from a pump. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66125 “Mesh” defined. (NRS 445A.860) “Mesh” means an opening or space in a screen, the size of which is described by the number of openings or spaces per linear inch of the screen. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6613 “Meter box” defined. (NRS 445A.860) “Meter box” means a pit-like enclosure that protects one or more water meters installed in the ground outside a building and allows access for a person to read the meters. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66135 “Meter stop” defined. (NRS 445A.860) “Meter stop” means an isolation valve located in a meter box on a water service lateral that is upstream from the water meter. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6614 “mg/L” defined. (NRS 445A.860) “mg/L” means milligrams per liter. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66145 “Microscopic particulate analysis” defined. (NRS 445A.860) “Microscopic particulate analysis” means an examination of water to determine the presence and amounts of microscopic plants, animals and other solids, including, without limitation, bacteria, algae, diatom…

NAC 445A.6615 “Neat cement” defined. (NRS 445A.860) “Neat cement” means a mixture of water and portland cement in a ratio of not less than 5 nor more than 6 gallons of water for each bag of cement. (Added to NAC by Bd. of Health, eff. 2-20-97)