04 NCAC 11 R07-29. UTILITIES COMMISSION

R7‑29     WATER METER ACCURACY

(a)  Installation Test. - Every water service meter, whether new or repaired, shall be in good order and shall be correct to within 2% fast or slow before being installed for the use of any customer.

(b)  Meter Test Flows. - The following test rates are recommended for conducting test:

 

It is recommended that no less than three rates of flow be used.

 

                                Allowable Range Test Flow               Recommended Test

Meter                        Gallons per Minute                                    Rate Flow                     Gallons per Minute

 

Size                         Min.        Max.                                                      Min.                        Med.       Max.

1 ½                         5              100                                                         5                              25           100

2                              8              160                                                         8                              40           160

3                              16           300                                                         15*                         100         300

4                              28           500                                                         15*                         250         500

6                              48           1000                                                       20*                         500         1000

 

*Note - A meter failing to register 5% of the water passed at those rates marked * should not be installed without correction.

(c)  Method of Testing. - All tests to determine the accuracy of registration of any water service meter shall be made with suitable testing instruments.