C703-70: AWWA Standard for Cold-Water Meters--Fire Service Type (PDF)
SKU: STC_0074324-PDF
This standard covers the various types and classes of cold water fire service type meters in sizes 3 inches through 10 inches, and the materials and workmanship employed in their fabrication. Fire service meters shall consist of a combination of a main line meter of the proportional type, having unobstructed passageway of essentially the full pipe size, for measuring high rates of flow, and a bypass meter of the compound or positive displacement type for measuring low rates of flow, with an automatic valve mechanism for diverting low rates of flow through the bypass meter.
Description
The major revisions in this edition of the standard include the following: addition of a foreword and Sec. 2 - Information To Be Furnished by the Purchaser; deletion of the 12 in. size from the Standard; addition of recommended safe maximum rates for continuous operation in Table 1; clarification of register indications, capacities, and test flow requirements in view of varying main line and bypass meter arrangements by different manufacturers; addition of meter case maximum overall length requirements; and, updating the requirements for materials and design.