CHAPTER 445A - WATER CONTROLS

NAC 445A.6617 “Operating storage” defined. (NRS 445A.860) “Operating storage” means water stored in a tank during periods of small demand for water for the purpose of supplying a particular portion of the area of service of a public water system when the demand for water in the a…

NAC 445A.66175 “Overflow rim” defined. (NRS 445A.860) “Overflow rim” means the unobstructed open edge of a tank, plumbing fixture or other container. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6618 “Packing” defined. (NRS 445A.860) “Packing” means a material, usually composed of a lubricant and a woven or braided fiber of an animal, plant, mineral or metal nature, which is placed in rings around the shaft of a pump or stem of a valve and used to control leakag…

NAC 445A.66185 “Peak hour demand” defined. (NRS 445A.860) “Peak hour demand” means the volume of water which must be supplied by a public water system to meet the demand of its customers for water during the hour that the maximum amount of water is used for a yearly period, as de…

NAC 445A.6619 “Pet cock” defined. (NRS 445A.860) “Pet cock” means a small device which is used for regulating or stopping the flow of water in a pipe and which consists of a rotating taper plug in a body that has ports which correspond to those in a plug or valve. (Added to NAC b…

NAC 445A.66195 “pH” defined. (NRS 445A.860) “pH” means the logarithm of the reciprocal of the concentration of hydrogen ions. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66205 “Pipe sleeve” defined. (NRS 445A.860) “Pipe sleeve” means a protective tube into which a pipe is inserted, which consists of: 1. Steel with walls that are at least 1/4-inch thick; or 2. A material that is of a suitable quality for supplying drinking water, pursuant…

NAC 445A.6621 “Pitless adapter” defined. (NRS 445A.860) “Pitless adapter” means a commercially manufactured device designed for below-grade attachment to openings through the casing of a water well that permits water service pipes to pass through the wall or an extension of the c…

NAC 445A.66215 “Plunge pool” defined. (NRS 445A.860) “Plunge pool” means an artificial basin that is located at the base of a falling discharge of water and protected to prevent erosion. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6622 “Point-of-entry treatment device” defined. (NRS 445A.860) “Point-of-entry treatment device” means a device that treats all water entering a home or other building. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66225 “Point-of-use treatment device” defined. (NRS 445A.860) “Point-of-use treatment device” means a device that delivers treated water to a particular faucet located inside a home or other building. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6623 “Pollution” defined. (NRS 445A.860) “Pollution” means an alteration of the chemical, physical, biological or radiological integrity of water that: 1. Impairs the quality of the water to such an extent that the impairment adversely and unreasonably affects those aest…

NAC 445A.66235 “ppm” defined. (NRS 445A.860) “ppm” means parts per million. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6624 “Pressure regulator” defined. (NRS 445A.860) “Pressure regulator” means a valve with a horizontal disc or diaphragm for automatically sustaining or reducing water pressure in a main, lateral or service line at or to a preset value. The term includes a pressure-reduc…

NAC 445A.66245 “Pressure relief valve” defined. (NRS 445A.860) “Pressure relief valve” means a valve that opens automatically when the water pressure reaches a preset limit, to relieve the stress on a pipeline. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6625 “Pressure vacuum breaker” defined. (NRS 445A.860) “Pressure vacuum breaker” means a vacuum breaker that: 1. Contains an independently operating, internally loaded approved check valve and an independently operating, loaded air inlet valve located on the discharge si…

NAC 445A.66255 “Primary standard” defined. (NRS 445A.860) “Primary standard” has the meaning ascribed to it in NAC 445A.450. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6626 “Prime mover” defined. (NRS 445A.860) “Prime mover” means an internal combustion engine, electric motor or other source of power which is designed to provide the force and motion necessary to drive a pump or other machinery. (Added to NAC by Bd. of Health, eff. 2-20…

NAC 445A.66265 “Priming” defined. (NRS 445A.860) “Priming” means the starting of flow in a pump, including, for a centrifugal pump, filling the casing and suction pipe with water. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6627 “Prohibited water well” defined. (NRS 445A.860) “Prohibited water well” means a water well prohibited pursuant to NAC 445A.6687. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66275 “Properly certified laboratory” defined. (NRS 445A.860) “Properly certified laboratory” means a laboratory certified in accordance with the provisions of NAC 445A.542 to 445A.54296, inclusive, to perform appropriate analyses. (Added to NAC by Bd. of Health, eff. 2-…

NAC 445A.6628 “psi” defined. (NRS 445A.860) “psi” means pounds per square inch. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66285 “Public water system” defined. (NRS 445A.860) “Public water system” has the meaning ascribed to it in NRS 445A.840. (Added to NAC by Bd. of Health, eff. 2-20-97; A by R021-02, 8-29-2002)

NAC 445A.6629 “PVC” defined. (NRS 445A.860) “PVC” means polyvinyl chloride. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66295 “Raw water” defined. (NRS 445A.860) “Raw water” means water that is not suited for human consumption without treatment. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66305 “Reaction blocking” defined. (NRS 445A.860) “Reaction blocking” means the strategic placement of a block of concrete between a fitting and undisturbed soil at the side or bottom of a pipe trench, to prevent the movement of pipes, tees, crosses, valves, bends, hydra…

NAC 445A.6631 “Reduced pressure detector assembly” defined. (NRS 445A.860) “Reduced pressure detector assembly” means an assembly designed to protect against pollution and contamination which is composed of a line-sized, reduced pressure principle assembly and a bypass that conta…

NAC 445A.66315 “Reduced pressure principle assembly” defined. (NRS 445A.860) “Reduced pressure principle assembly” means an assembly that: 1. Contains: (a) Two independently acting approved check valves; and (b) A hydraulically operating, mechanically independent pressure relief …

NAC 445A.6632 “Reducer” defined. (NRS 445A.860) “Reducer” means a pipe or pipe fitting that has a smaller opening at one end than at the other end. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66325 “Residential equivalent” defined. (NRS 445A.860) “Residential equivalent” means the average daily demand for water that is typical of a private residence served by a single service connection. If the demand for water by nonresidential users is: 1. Known or estimate…

NAC 445A.6633 “Residual flow control” defined. (NRS 445A.860) “Residual flow control” means an automatic method of chlorination that maintains a constant chlorine residual, regardless of how changes in the quality or rate of flow of water cause changes in the demand for chlorine.…

NAC 445A.66335 “Residual pressure” defined. (NRS 445A.860) “Residual pressure” means the pressure remaining in the water mains of a distribution system when water is being withdrawn from the distribution system at a particular rate of flow. (Added to NAC by Bd. of Health, eff. 2-…

NAC 445A.6634 “Sanitary seal” defined. (NRS 445A.860) “Sanitary seal” means the watertight seal established in the annular space between the casing and drill hole of a water well to prevent the inflow and movement of surface water or shallow groundwater, or to prevent the outflow…

NAC 445A.66345 “Sanitary sewer” defined. (NRS 445A.860) “Sanitary sewer” means an underground system of sewer lines for the collection and conveyance of any type of wastewater from a home or community. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6635 “Sanitary survey” defined. (NRS 445A.860) “Sanitary survey” means an on-site evaluation of a public water system to determine whether the water sources, facilities, equipment, processes, administration, operation and maintenance of the system are adequate for the pr…

NAC 445A.66355 “Seal water” defined. (NRS 445A.860) “Seal water” means water that is applied to a stuffing box to lubricate and flush the packing or mechanical seal. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6636 “Secondary standard” defined. (NRS 445A.860) “Secondary standard” means a standard which specifies a maximum level for constituents found in a public water supply which, if exceeded, may adversely affect the public welfare. The standards apply to constituents that a…

NAC 445A.66365 “Sedimentation” defined. (NRS 445A.860) “Sedimentation” means a process carried out before filtration for the removal of settleable solids by gravity or separation. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6637 “Self-priming pump” defined. (NRS 445A.860) “Self-priming pump” means an end-suction, centrifugal pump that has: 1. The suction supply mounted above the eye of the impeller; and 2. A recirculation port placed between the suction and discharge portions of the pump. (…

NAC 445A.66375 “Service connection” defined. (NRS 445A.860) “Service connection” has the meaning ascribed to it in NRS 445A.843. (Added to NAC by Bd. of Health, eff. 2-20-97; A by Environmental Comm’n by R049-18, 8-30-2018)

NAC 445A.6638 “Service line” defined. (NRS 445A.860) “Service line” means the pipe and all appurtenances located between a water main of a distribution system and the place where a customer of the public water system uses the water. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66385 “Set point” defined. (NRS 445A.860) “Set point” means the pressure or flow that an automatic control is designed to maintain. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6639 “Sewer line” defined. (NRS 445A.860) “Sewer line” means a pipe or conduit and any appurtenances, including catch basins and manholes, used to convey wastewater or surface drainage. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66395 “Sewer main” defined. (NRS 445A.860) “Sewer main” means a: 1. Gravity sewer line with a diameter that: (a) Exceeds 6 inches; or (b) Equals 6 inches if the gravity sewer line has connections from more than one sewer service lateral; 2. Pressurized sanitary sewer lin…

NAC 445A.66405 “Sewer service lateral” defined. (NRS 445A.860) “Sewer service lateral” means a pipe or conduit that connects a building or other property to a sewer main. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.6641 “Silt stop” defined. (NRS 445A.860) “Silt stop” means a device placed at the outlet of a storage structure to prevent silt or sediment from reaching a user of the water. (Added to NAC by Bd. of Health, eff. 2-20-97)

NAC 445A.66415 “Spool” defined. (NRS 445A.860) “Spool” means a short section of pipe with flanged ends. (Added to NAC by Bd. of Health, eff. 2-20-97)