This standard describes post-type, dry-barrel fire hydrants with compression shutoff (opening against or with the pressure) or gate shutoff for use in water supply service in all climates, including those where freezing occurs. Major changes made to the standard in this revision include the following: edited throughout to conform to the current AWWA recommended format; NSF/ANSI 61 references for fire hydrants corrected; Sec. 1.2, Purpose, and Sec. 1.3, Application, were added; identification of copper alloys changed to refer to their respective ASTM standard number in Table 1 in place of the letter grade of bronzes; references to metric bolting added; Table 5 expanded to include loss of head at 1,500 gpm flow rates; Figure A.1 added for the “American National Fire Hose Screw Thread” configuration; and, Figure A.2 added for the “Nominal Dimensions of Connections.”
