1. Any approved backflow prevention device required by section 9-306 shall be installed at a location and in a manner approved by the Manager. The consumer, at his sole expense, shall obtain and install said approved backflow prevention device(s) within ninety (90) days of notice and as directed by the Manager.
2. Existing backflow prevention devices approved by the Manager prior to the effective date of this rule and which are properly maintained shall, except for inspection, testing, and maintenance requirements, be excluded from the requirements of section 9-306 (1) but only if the Manager determines that the devices will satisfactorily protect the public water supply system. One hundred percent closing shut off ball valves for testing shall be provided on existing backflow prevention devices, if deemed necessary for proper testing by the Manager. If deemed necessary by the Manager that an existing backflow prevention device requires replacement, it shall be replaced with an approved backflow prevention device.