AWWA C703

Abstract

This standard describes the various types and classes of cold-water fireserviceType meters in sizes 3 in. (80 mm)* through 10 in. (250 mm) and the materials and workmanship used in their fabrication. A fire-service meter shall consist of one of the following: <br>1. A combination of (1) a mainline meter of the proportional type, either Underwriters Laboratories^&#8224; (UL) listed or Factory Mutual Research^&#8225; (FM) approved, having an unobstructed passageway of essentially the pipe size, for measuring high flow rates; (2) a bypass meter of the appropriate size for measuring low flow rates; and (3) an automatic valve for diverting flow rates other than fire demand through the bypass meter. <br>2. A combination of (1) a mainline meter of the turbine type (Class II), either UL listed or FM approved; (2) either a UL-listed or an FM-approved fireservice strainer;(3) a bypass meter of the appropriate size for measuring low flow rates; and (4) an automatic valve for diverting flow rates other than fire demand through the bypass meter. <br>3. A combination of (1) a mainline meter of the turbine type (Class II), either UL listed or FM approved; and (2) either a UL-listed or an FM-approved fire-service strainer. <br><strong>Purpose</strong> <br>The purpose of this standard is to provide the minimum requirements for cold-water meters&#8212;fire-service type <br>^*Metric conversions given in this standard are direct conversions of US customary units and not those specified in International Organization for Standardization (ISO) standards. <br>&#8224;Underwriters Laboratories, 333 Pfingsten Rd., Northbrook, IL 60062. <br>&#8225;Factory Mutual Research Corporation, 270 Central Ave., Johnston, RI 02919.