Sec. 500.1. General

(a) All waterworks corporations under the jurisdiction of the Public Service Commission shall install approved meters and approved accessories, and before placing in service, test all water meters used for the purpose of billing customers, and shall adjust the same so that the registration on the meter dial shall indicate the quantity of water actually passing through the meter within the limits herein provided. However, meters and accessories placed in the field prior to the effective date of the approval regulations will be grandfathered, based on a review of the accuracy and reliability performance data supplied by waterworks corporations as directed by commission staff. Such application must be submitted within six months of the effective date of this section.

(b)

(1) No waterworks corporation furnishing metered water service shall allow a meter to remain in service for a period longer than that specified in the following table without checking or testing said meter for accuracy and making the necessary readjustments if found to be incorrect beyond the limits herein provided.

Size of meter	Interval between test
⅝ -inch, ¾ -inch	15 years
1-inch	5 years
1 ½ -inch, 2-inch	4 years
3-inch	3 years
4-inch	2 years
6-inch and larger	1 year

In the case of new model water meters, the company shall test a sample of the meters after they have been in service for five years. The size of the sample shall be 10 percent of the total meters of that model in service for five years or, alternatively, any percentage which the company can demonstrate is statistically valid. When the test results have proven satisfactory for three consecutive years, the sampling of these meters may be discontinued.

(2) Nor shall any meter be permitted to remain in service without similarly checking for accuracy and readjusting when its registration since the last test exceeds the following:

Size	Interval between test registration
⅝ -inch	1,500,000 gallons
¾ -inch, 1-inch	2,000,000 gallons
1 ½ -inch	3,000,000 gallons
2-inch	7,000,000 gallons

provided, however, that such routine tests shall not be required more often than once a year.

(c) All water meters in service on or after April 1, 1932, for which there is no record of test within five years, shall be tested promptly thereafter, and in all cases within one year from said date; provided, however, that companies having over 5,000 meters will be allowed two years; but at least one half of the meters shall be tested during the first year.

(d) A complete record shall be kept by each waterworks corporation of all tests made by it to include:

(1) owning or serving company's number;

(2) manufacturer's name and number;

(3) type and rated capacity;

(4) date of installation, removal, and test;

(5) reason for test;

(6) history of meter; to include date of purchase, various places of installation with dates of installation and removal and reason for such removal; and

(7) date of test; to include meter readings, measurement of water passed, method of measurement, location of test whether on premises of customer, in laboratory or shop or elsewhere, and any other pertinent information.

(e) On and after March 31, 1946, all waterworks corporations shall make report of water meter tests on Revised Form No. 2 and in accordance with the instructions attached thereto.

(f) In order to facilitate the testing of new or repaired meters, the commission may detail inspectors to make tests on the premises of water supply corporations or meter manufacturers or at meter repair shops, provided such premises are maintained and equipped as hereinafter provided.

(g) The name of the manufacturer and a serial number shall be plainly stamped on each meter.

(h) Upon placing or replacing a meter in service, unless the register is set at zero, the water company shall securely attach a tag stamped with figures indicating the date and meter dial reading at the time of setting. When removing a meter, or when a reading is taken for rendering a final bill, the consumer shall be given the reading at the time and shall be given the opportunity to read the meter if he so desires.

Notation

1

Revised Form No. 2 and its corresponding instructions are set out in Appendix 9-A.