Existing backflow prevention devices approved by the city prior to the effective date of this rule and which are properly installed and maintained shall, except for inspection, testing, and maintenance requirements, be excluded from the requirements of this section but only if the city determines that the devices will satisfactorily protect the public water supply system. One-hundred-percent closing shut off ball valves or resilient seat gate valves for testing shall be provided on existing backflow prevention devices, if deemed necessary for proper testing by the city. If the city determines that an existing backflow prevention device requires replacement, it shall be replaced with an approved backflow prevention device.
(Prior Code, § 51.108) (Ord. 1493, passed 1-25-1993)