Section 33.1-18-01-09 - Materials for water distribution1.Water service pipe.a. Public water systems. Water service pipe from the well to the point of entrance to a pumphouse or building must be as shown on approved plans and specifications.b. Private water systems. Water service pipe from the well to point of entrance to a pumphouse or building must be made of copper, galvanized steel, or approved plastic. Approved plastic (polyvinyl chloride, polyethylene, or polybutylene) must have a minimum pressure rating of one hundred sixty pounds per square inch at seventy-three degrees Fahrenheit [11.25 kilograms per square centimeter at 22.8 degrees Celsius]. Copper tube, when used underground, may not be less than type L.All threaded ferrous pipe and fittings must be galvanized or cement-lined and, when used underground in corrosive soil or filled ground, must be coal tar enamel-coated and threaded joints must be coated and wrapped when installed. All piping must comply with applicable standards for such piping. Polyvinyl chloride, polyethylene, and polybutylene pipe shall carry the seal of the national sanitation foundation.
Permeation through polyethylene and polybutylene pipes by organic contaminants (including petroleum byproducts) can occur resulting in contamination of water supplies. Where there is known contamination of soils by organics or a high probability that contamination of soils by organics may occur, it is recommended that polyethylene and polybutylene pipe not be used to construct water supply lines.
2.Fittings. The materials of which water supply system pipe fittings are made must be compatible with the type of piping materials used in the water supply system.3.Material strength.a. All materials used for water piping must be suitable for use with the maximum temperature, pressure, and velocity that may be encountered in the installation, including temporary increases and surges.b. When the standards for the piping material used for hot and cold water distribution limit the working pressure or temperature to values lower than usually encountered, the relief valve may be set no higher than the limits of the standard.N.D. Admin Code 33.1-18-01-09
Adopted by Administrative Rules Supplement 370, October 2018, effective 1/1/2019.General Authority: NDCC 43-35-19, 43-35-19.1; S.L.2017, ch.199, § 1
Law Implemented: NDCC 43-35-19, 43-35-19.1; S.L.2017, ch.199, §§ 45, 46