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AWWA C904-2022
Crosslinked Polyethylene (PEX) Pressure Tubing, 1/2 In. (13 mm) Through 3 In. (76 mm) for Water Service
The purpose of this standard is to provide the requirements for materials, design, testing and inspection, and shipping of PEX tubing for use as service lines in the construction of underground water distribution systems
AWWA: American Water Works Association [awwa]