(A) All presently installed backflow prevention assemblies that do not meet the requirements of this subchapter but were approved assemblies for the purpose described in this subchapter at the time of installation, and that have been properly maintained, shall, except for the inspection and maintenance requirements under § 51.073, be excluded from the requirements of this subchapter so long as the Superintendent is assured that they will satisfactorily protect the utility system. Whenever the existing assembly is moved from the present location or requires more than minimum maintenance, or when the Superintendent finds that the maintenance constitutes a hazard to health, the unit shall be replaced by an approved backflow prevention assembly meeting the requirements of this section.
(B) The Superintendent may issue a letter exempting a customer from the requirements of this subchapter, if the customer can document to the satisfaction of the Superintendent that the activities taking place at the customer’s facility and the materials used in connection with these activities or stored on the premises cannot endanger the health of customers or degrade the water quality of the public water system. An exemption shall remain valid for no more than three years, following the date of issuance, but can be reissued by the Superintendent. An exemption shall be void if it is determined that the customer’s facility has become a backflow hazard. Those customers granted an exemption shall report to the Superintendent any proposed change in process, plumbing materials used or stored at the exempted facility at least 14 days prior to making the change.
(Ord. 357, passed 4-1-2006)