AWWA C903 : 2021 Title: Polyethylene-Aluminum-Polyethylene & Cross-Linked Polyethylene-Aluminum-Cross-Linked Polyethylene Composite Pressure Pipes, 1/2 In. (12 mm) Through 2 In. (50 mm) for Water Service Year: 2021 Publisher: American Water Works Association Availability: Within 1-2 working days