AWWA COMMENT PERIOD ON AWWA C509 – Resilient-Seated Gate Valves for Water Supply Service

AWWA COMMENT PERIOD ON AWWA C509 – Resilient-Seated Gate Valves for Water Supply Service
Nov. 4, 2022

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. 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 Dec. 19, 2022.

Send comments to:
Liz Ralph
303.347.6177 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 Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.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 iron-body resilient-seated gate valves with nonrising stems (NRS) and outside screw-and-yoke (OS&Y) rising stems, including tapping gate valves, for water supply service.

MAJOR REVISIONS
Major revisions made to the standard in this edition include the following:
1. Updated Sec. I.C. Acceptance in the Foreword with the latest Standards Council language reflecting the addition of reference to NSF/ANSI/CAN 372 and NSF/ANSI/CAN 600.
2. The scope of the standard was revised to include gate valve sizes 42 in. thru 72 in. (1,050 mm thru 1,800 mm).
3. Definitions were added to Sec. 3 for potable water, reclaimed water, reduced waterway, and wastewater.
4. Updated Sec. 4.2.1 Materials and Sec.4.2.2 Permeation with the latest Standards Council boilerplate language.
5. The allowable dezincification depth for copper alloys was increased from 25 microns to 100 microns in Sec. 4.2.4.5.5.
6. Liquid epoxy and fusion bonded epoxy coatings were added as allowable coatings to Sec. 4.2.4.11 Coatings.
7. Sec. 4.3.3 Size of Waterway was revised to require valves sizes 48 in (1,200 mm) and smaller to have a full waterway and added in a new Sec. 4.3.3.2 providing  requirements for reduced and full waterways for valves 54 in. (1,400 mm) and larger.
8. Table 2 Minimum full waterway sizes, was revised to include valves sizes 42 in thru 72 in. (1,050 thru 1,800 mm) and added requirements for minimum reduced waterway diameters for sizes 42 in thru 72 in. (1,050 thru 1,800 mm).
9. Tables 3, 4, 5, 10 and 11 were revised to include valves sizes 42 in. thru 72 in. (1,050 thru 1,800 mm).
10. Tables 8 and 11 were revised to include valves sizes 42 in. thru 72 in. (1,050 thru 1,800 mm) and requirements for reduced and full waterways for these sizes.
11. Sec. 4.4.1.4.4, #1 Tapping valve ends was revised to include sizes up to 60 in. (1,500 mm).
12. A new Sec. 4.4.7.1 Legible writing was added to address marking on wrench nuts and handwheels.
13. A new Appendix B was added on Valve Bypasses.