Accuracy Requirements

(1) All meters used for measuring quantity of water delivered to a customer shall be in good mechanical condition and shall be adequate in size and design for the type of service which they measure and shall be accurate to the following standards. (2) For determination of minimum test flow and normal test flow limits, the Commission will use as a guide the appropriate standard specifications of the American Water Works Association for the various types of meters. (3) Displacement meters shall be tested at each of the rates of flow stated above for the various size meters. A meter shall not be placed in service if it registers less than ninety-five percent (95%) of water passed through it at the minimum flow or over-registers or under-registers more than two percent (2%) at the intermediate or maximum limit, except that a repairs meter shall not over-register or under-register more than two percent (2%) of the intermediate and maximum flow and shall register not less than the following appropriate percentage of the water passed through it at the minimum test flow: If manufactured on or after January 1, 1947 – ninety percent (90%). If manufactured prior to January 1, 1947 – eighty-five percent (85%).