scope:

This standard describes the various types and classes of cold-water fireservice- type 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:

a. A combination of (1) a mainline meter of the turbine type (class II), either Underwriters Laboratories^† (UL) listed or Factory Mutual Research^‡ (FM) approved; (2) either a UL-listed or an FM-approved fire-service 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.

b. 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 fireservice strainer.

* Metric conversions given in this standard are direct conversions of US customary units and not those specified in International Organization for Standardization (ISO) standards.

† Underwriters Laboratories, 333 Pfingsten Road, Northbrook, IL 60062.

‡ Factory Mutual Research Corporation, 270 Central Avenue, Johnston, RI 02919.

Purpose

The purpose of this standard is to provide the minimum requirements for cold-water meters-fire-service type.