This standard provides the field installation guidelines for buried steel water pipe, 4 in. (100 mm) and larger. The information contained in this standard is intended to be used as a guide to assist in the installation of steel water pipe. Major revisions made to the standard in this edition include the following: the format has been changed to AWWA standard style; added Standards Council materials language as new (Sec. 4.2); revision of trench widths (Sec. 4.4.2.3); revision of rock conditions (Sec. 4.4.2.6); the section on unsuitable subgrade material was revised (Sec. 4.4.2.10); an additional paragraph was added on pipe installation (Sec. 4.4.3); a section on pipe on steep grades was added (Sec. 4.4.3.6); revisions were made to the section on pipe placement for rubber-gasketed joints (Sec. 4.4.4.1.1); revisions were made to the section on pipe placement for welded lap joints (Sec. 4.4.4.2); an additional paragraph was added regarding the weld-after-backfill method (Sec. 4.4.4.2); the procedure for flanged joints was revised (Sec. 4.4.4.4.); a new Figure 5 was added for bolt torque sequence; revisions were made to the welded joints section (Sec. 4.4.4.9); additional information was added on heat-shrink sleeve installation (Sec. 4.4.4.13.3); additional information was added regarding cement mortar for field joints and repairs (Sec. 4.4.4.13.4); Sec. 4.4.5, Fitting installation, was deleted; revisions were made to the section on backfilling (Sec. 4.4.6); Figure 5, Pipe bedding, was replaced with new Figure 6, Trench cross section; a new Table 1 on soil stiffness categories was added; revisions were made to test restrictions (Sec. 5.2.1); and, a new section on affidavit of compliance was added (Sec. 6.2).