1. Potable water of a sufficient amount to meet the requirements of a school must be provided to the school from a supplier that is approved by the health authority and licensed by the Health Division.2. Water that is under pressure and maintained at the required temperature must be provided to all fixtures and equipment of the school which uses water. The system that provides hot water to the school must provide a sufficient amount of hot water to meet the requirements of the school during its hours of operation.3. There must not be a cross connection between:(a) The supply of potable water and any water that is nonpotable or may be nonpotable; or(b) The supply of potable water and any source of pollution by which the potable water may become contaminated.4. A system for supplying nonpotable water may be used only for air conditioning, cleaning, flushing toilets and fire protection, if the system is approved by the health authority and does not come into direct or indirect contact with the supply of potable water. The piping of a system for nonpotable water must be clearly and permanently identified so that it is readily distinguishable from piping which carries potable water.5. The system for potable water must be installed to prevent backflow. Devices to prevent backflow and back siphonage must be installed on a fixture or equipment that does not have an air gap which is at least twice the diameter of the inlet for the water between the inlet and the flood level rim of the fixture. A hose may not be attached to a faucet unless a device to prevent backflow is installed.6. A device to prevent backflow or back siphonage that is installed on a system for potable water must comply with the standards for the construction, installation, maintenance, inspection and testing for that specific application and type of device set forth in the Uniform Plumbing Code, as adopted by reference in NAC 444.56816.7. The use of lead solder on piping carrying potable water is prohibited.Nev. Admin. Code § 444.5685
Added to NAC by Bd. of Health by R177-99, eff. 7-24-2002