The city’s certified inspector shall be responsible for the protection of the public potable water distribution system from contamination or pollution due to the backflow or back siphonage of contaminants or pollutants through the water service connection. If, in the judgement of the inspector, an approved backflow device is required at the city’s water connection to any customer’s premises, the inspector, or his/her delegated agent, shall give notice in writing to said customer to install an approved backflow prevention device at each service connection to his premises. The customer shall, within 90 days, install such approved device, or devices, at his own expense, and failure or refusal, or inability on the part of the customer to install said device or devices within 90 days, shall constitute a ground for discontinuing water service to the premises until such device or devices have been properly installed. (Ord. 347 § 3, 1995).