AWWA COMMENT PERIOD ON AWWA C563, Fabricated Composite Slide Gates

AWWA COMMENT PERIOD ON AWWA C563, Fabricated Composite Slide Gates

October 9, 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 November 23, 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 Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.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 describes vertically mounted, fabricated, composite, resilient seated slide gates with full-aperture closure, designed for either seating head or unseating head or both, in ordinary water supply and wastewater service. The gate are primarily used to shut off or throttle water and wastewater flow through a rectangular or round orifice, end of channel, or in-channel opening. They may be of either conventional-closure or flush-bottom–closure type and may be opened either upward or downward. This standard also describes manual gate actuator mechanisms together with standard

accessories. Power-actuated mechanisms (including electric or hydraulic) are described in ANSI/AWWA C541 and ANSI/AWWA C542.

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

1. A section on chlorine and chloramine degradation of elastomers was added to the foreword (Sec. II.A).

2. The definition of constructor was removed from the standard.

3. Section 4: Requirements was extensively updated to read consistently among the four slide gate standards, except for where materially different.

4. Tensile, compressive, and critical buckling loads were readdressed and clarified, along with the definitions for rated and extreme loads.

5. A basis for rejection section was added (Sec. 5.3).