ARM 36.21.646
ARM 36.21.646. PLASTIC CASING JOINTS
Cite as Mont. Admin. R. 36.21.646
(1) All casing joints shall be watertight. Either "bell" type or coupling hubs or threaded couplings are approved. Hub couplings shall be of material meeting the specifications for plastic casings as stipulated in ARM 36.21.645. Solvent cemented joints shall be made in accordance with manufacturer's directions.