AWWA COMMENT PERIOD ON AWWA C620, Spray-In-Place Polymeric Lining for Potable Water Pipelines 4 In. (100 mm) and Larger

AWWA COMMENT PERIOD ON AWWA C620, Spray-In-Place Polymeric Lining for Potable Water Pipelines 4 In. (100 mm) and Larger
March 27, 2026

AWWA solicits public comments on all proposed new AWWA Standards, and on all proposed revisions, reaffirmations, or withdrawals of existing AWWA Standards. The referenced standards project is being considered for approval and the publication of this notice begins the 45-day public comment period for AWWA and ANSI. An electronic public review copy of the proposed standard can be obtained for review during the comment period by emailing ETS Support (ETSsupport@awwa.org). Comments must be submitted in writing to the AWWA contact listed below no later than the last day of the comment period specified herein. Such comments shall be specific to the section(s) of the standard under review and include sufficient detail, so as to enable the reader to understand the commenter’s position, concerns and suggested alternative language, if appropriate.

AWWA Comment Period closes on May 11, 2026.

Send comments to:
Amanda Dail, ADail@awwa.org
303.734.3466 phone

The review copy will be edited for publication and may also be revised as appropriate based on any comments received during the public comment period. Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.

Final publication of the standard may take several months. When it is available, a notice will be published in the official notice section of Journal – American Water Works Association. The standard becomes an effective AWWA standard on the first day of the month following such publication in Journal – American Water Works Association.

SCOPE
This standard covers the requirements for materials, equipment, and workmanship, for field application of spray-in-place polymeric linings (SIPP) to the interior of existing potable water pipelines. The potable water pipelines to be rehabilitated may be constructed of pipe materials such as steel, ductile iron, cast iron, asbestos cement, and concrete. Related work required for performing a complete contract is also generally described.

The standard covers all polymeric materials used in spray-in-place applications including epoxies, polyurethanes, polyureas, and hybrids of these compounds. The standard does not include polymeric composites that contain reinforcing fabrics or materials such as fiberglass or carbon fiber.

The in-situ spray application of polymeric materials is appropriate for pipe sections that can be lined with a computerized spray rig. The umbilical hose of the rig is inserted through the pipeline and then withdrawn progressively and uniformly using either a computerized winch or a self-propelled assembly and a spray head that applies the polymeric material on the pipe surface to provide a continuous, smooth lining of uniform thickness.

MAJOR REVISIONS
Major revisions made to the standard in this edition include the following:

1. Added a new subsection, Distributing Information to Customers, to the Special Issues section of the Foreword (Sec. II.E.).
2. Added maximum allowable operating pressure (MAOP) as a new purchaser defined item in the Foreword (Sec. III.A., No. 5).
3. New detail was added throughout for host pipe condition assessment and preparation of pipe before lining.
4. New definitions were added for design reconciliation, dry film thickness, lift, lining apparatus, maximum allowable operating pressure (MAOP), overline, polymeric linings, raw water, SIPP termination, type testing, umbilical, and wet film thickness (Sec. 3).
5. Additional design information has been added throughout to include survival of the host pipe for design purposes and the inclusion of design reconciliation.
6. More detail was added for SIPP physical and mechanical properties as well as chemical and bacteriological resistance (Sec. 4.1.3).
7. Clarifications were added for disinfection and sanitation of equipment and prevention of contamination and debris entering exposed pipe (Sec. 4.5.3 and Sec. 4.6.3).
8. More specific criteria were added for application equipment and the lining process in new section Application of Polymeric Material (Sec. 4.7).
9. Additional guidance was added for final inspection and potential defects (Sec. 4.8).
10. Flushing, disinfecting, re-commissioning, backfilling, and the constructor final report were organized under new section Return to Service (Sec. 4.9).
11. A new section was added for Maintenance and Repair (Sec. 4.11).
12. Additional guidance has been provided for quality assurance/control (Sec. 5).
13. Product delivery verification and handling and storage guidance were added (Sec. 6.1).