AWWA C104/A21.4-16

This standard provides the minimum requirements for shop-applied, cement-mortar linings for ductile-iron pipe and ductile-iron and gray-iron fittings for potable water, raw water, wastewater, and reclaimed water systems, including requirements for cement, sand, water, and mortar; surface of pipe and fittings for lining; method and thickness of lining; and curing.

Major revisions made to the standard in this edition include:

1. Scope, purpose and application of standard were expanded to include raw water applications. 2. Definitions for raw and potable water were added. 3. A new section on materials intended for use with potable water was added. 4. A provision for manufacturers to use a blend of types of cement mortar was added.