AWWA COMMENT PERIOD ON AWWA C105/A21.5, Polyethylene Encasement for Ductile-Iron Pipe Systems

AWWA COMMENT PERIOD ON AWWA C105/A21.5, Polyethylene Encasement for Ductile-Iron Pipe Systems October 30, 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 December 14, 2026.

Send comments to: Jason Hrdlicka, JHrdlicka@awwa.org 303.347.6266 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 Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.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 materials and installation procedures for polyethylene encasement to be applied to underground installations of ductile-iron pipe. This standard also may be used for polyethylene encasement of fittings, valves, and other appurtenances to ductile-iron pipe systems.

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

1. Revision to installation methods in wet trench conditions in Sec. 4.4.3.

2. Addition of saddle tap requirements on polyethylene wrapped pipe in Sec. 4.4.8.