A water meter shall be considered accurate if, when tested, it registers not to exceed five percent more or five percent less than the actual quantity of water passing through it. If a meter registers in excess of five percent more than the actual quantity of water passing through it, it shall be considered fast to that extent. If a meter registers in excess of five percent less than the actual quantity of water passing through it, it shall be considered slow to that extent.
(1974 Code § 2.29)