This standard describes gravel, high-density gravel, silica sand, high-density media, anthracite filter materials, and the placement of the materials in filters for water supply service application. Major revisions made to the standard in this edition include the following: changed standard title to Granular Filter Material; addition of paragraph to Sec. II.C, Filter Gravel in the foreword related to triple media filters; revision of Table F-1 in the foreword; updated investigation into potentially new anthracite standard, Sec. II.E, Anthracite Quality Tests in the foreword; addition of Sec. II.H, Removal of Filter Material and Reuse, in the foreword; addition of Sec. II.I, Possible Adverse Effects on Submerged Concrete Walls in filter Box in the foreword; addition of five definitions to Sec. 3, Definitions; additions and revisions to anthracite, silica sand, and high-density sand in Sec. 4.1, Physical Requirements; addition of detail in Sec. 4.4, Placing filter Material; replacement of maximum backwash rates with fluidization backwash rates in Sec. 4.5, Preparing Filter for Service; addition of new Sec. 4.6, Replenishing Filter Media in Existing Filter Bed; addition of lot size definition and jobsite sampling procedures in Sec. 5.2, Sampling; addition of test procedure in Sec. 5.3.5, Mohs' scale of hardness; and, replacement of Appendix A, Bibliography with updated bibliography.