| AWWA COMMENT PERIOD ON AWWA C550, Protective Interior Coatings for Valves and Hydrants
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AWWA COMMENT PERIOD ON AWWA C550, Protective Interior Coatings for Valves and Hydrants

AWWA COMMENT PERIOD ON AWWA C550, Protective Interior Coatings for Valves and Hydrants
April 29, 2024

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 June 17, 2024.

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 Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.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.


This standard describes protective interior coatings for valves used for water supply, wastewater collection and treatment, and reclaimed water service having a pH range from 4 to 9; and for hydrants used for water supply service. The standard describes the material, application, and performance requirements for these interior coatings. The coating shall not contain coal tar. These coatings are applied for protection of ferrous surfaces of valves and hydrants.


Major revisions to the standard in this edition include:
1. The language in Sec. 5.1.3 Holiday testing was revised to clarify holiday testing scope and procedure per Method A of ASTM G62, as high voltage testing per Method B is potentially destructive and outside the scope of this standard.
2. Added new holiday testing subsection to clarify that some casting geometries may inherently lead to holidays requiring remediation.