25-30.263. Meter Test Methods

(1) Each utility shall test its displacement type cold water meters on at least the three rates of flow set forth in the following chart: Meter Normal Test Size Flow Limits Test Flow Gallons Per Minute Inches GPM Minimum Median Maximum 5/8 1-20 1/4 2 15 3/4 2-30 1/2 3 25 1 3-50 3/4 4 35 1 1/2 5-100 11/2 8 50 2 8-160 2 15 100 3 16-300 4 20 150 4 28-500 37 40 200 6 48-1000 12 60 500 (2) Each utility shall test its current, compound and fire-service type meters on at least three rates of flow: one at the minimum test flow and two or more within the normal test flow limits of the table set forth in subsection (1) of this rule, with the upper test flow to be at a rate as high as practicable. (3) Each utility shall test its compound meters within the “changeover” range of flows to determine overall operational efficiency and accuracy of registration. (4) A utility may test any displacement type meter after installation if the meter is three inches or larger. However, each utility shall test its current, compound and fire-service type meters in place to achieve maximum accuracy, and may install a test tee in the outlet piping to facilitate and reduce the cost of testing for meters which are three inches or larger. (5) Each utility may affix a seal to each of its tested and adjusted meters. The utility may affix the seal in such manner that it would have to be broken before any adjustment to meter registration could be achieved.