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RF] <br />AMI Feasibility Report I Client Name: City of Santa Ana <br />as these are likely the oldest meters in the system. However, there are more nuanced concerns <br />within the specific size groups which are outlined below. <br />4.3.1.1 5/8" Meters <br />There were a number of the intermediate flow rates and low flow rate tests which failed. However, <br />within this set of meters there does appear to be one group that significantly underperforms the <br />others. The Rockwell meters perform worse than the Precision or Badger meters. This is likely in <br />part due to the fact that the Rockwell meters are older. This manufacturer name was changed (to <br />Invensys and Sensus) approximately 20 years ago, so this is likely to be the minimum age of these <br />meters. Master, Rockwell and Precision meters need replacement. Badger meters will have to be <br />reviewed as it will be difficult to test each meter and find which ones need to be replaced. One in <br />every three Badger meter is failing test and therefore we recommend to replace them all as it will <br />be expensive to test all meters to identify the ones with poor performance. More Master meters <br />should have been tested to verify their state. <br />Table 5 5/8 Inch Meter Test Results <br />Badger <br />Master <br />Precision <br />Rockwell <br />Total <br />4.3.1.2 3/4" Meters <br />62 20 32% <br />1 1 100% <br />36 <br />11.36 <br />135 <br />17 47% <br />23,686 <br />1,319 <br />4,312 <br />36 100% 2,055 <br />74 55% <br />The meters within this group are quite different with respect to degradation depending on the <br />meter manufacturer. The Master Meter and [Neptune meters perform well in comparison to the <br />Hersey meters. Hersey meters need to be replaced. More Master meters should have been tested to <br />verify their state. <br />25G-130 <br />