Flow Measurement Capabilities of Customer Water Meters

Neptune Fire Service Meter

In general, meter accuracy is influenced by two principal factors the physical performance of the flow sensing mechanism of the meter, and the appropriate sizing of the meter to fit the customer's consumption profile. Water utilities provide service to a wide variety of customers, from residential service 5 8-in meters typically in the United States to large industrial sites up to 12-in meters . Many accurate and reliable meter types exist to measure flows in this variety of settings each with...

Determining the System Input Volume

Definition The annual volume input to the water supply system. In case the entire system input is metered, the calculation of the annual system input should be a straightforward task. The regular meter records have to be collected and the annual quantities of the individual system inputs calculated. This includes own sources as well as imported water from bulk suppliers. The accuracy of the input meters should be verified on an annual basis, using portable flow-measuring devices, or if possible...

Iwaawwa Recommended Performance Indicators for Nonrevenue Water and Real Losses

Leakage Management Iwa

During the period 1996 to 2000, various IWA Task Forces undertook a detailed study to determine the most appropriate performance indicators for different water supply purposes. Table 7.4 below shows the PIs for nonrevenue water and real losses recommended by IWA1,2,8 converted to North American units. The PIs are categorized by function and by level, defined as follows Level 1 basic A first layer of indicators that provide a general management overview of the efficiency and effectiveness of the...