Materials.

62-04-03-01. Materials. 1. Minimum standards. Materials shall conform at least to the standards cited in this chapter, which shall be considered minimum standards, when used in the construction, installation, alteration, or repair of water conditioning systems or parts thereof, except that: a. The administrative authority shall allow the extension, addition to, or relocation of existing water pipes with materials of like grade or quality as permitted in subsection 1 of section