18-29-1202.5.3 Piping materials.
   Recirculation system pipe and fittings shall be of the materials indicated in Section 18-29-605 for water service pipe or water distribution pipe, or Schedule 40 polyvinyl chloride (PVC) plastic pipe complying with ASTM D1785, ASTM D2241, ASTM D2672 or CSA B137.3 and fittings complying with ASTM D2464, ASTM D2466, ASTM D2467, CSA B137.2 or CSA B137.3.
(Added Coun. J. 10-14-21, p. 37722, Art. XII, §1)