The Water Purveyor shall be responsible for the protection of the public potable water distribution system from contamination or pollution due to backflow from back-pressure or back-sIphonage of contaminants or pollutants through the water service connection. If, in the judgment of the Water Purveyor, an approved backflow preventer assembly is required at the water service connection to any customer's premises, the Water Purveyor, or his delegated agent, shall give notice in writing to said customer to install an approved backflow preventer assembly at each service connection to his premises. The customer shall, within ninety (90) days, install such approved assembly, or assemblies, at his own expense, and failure or refusal, or inability on the part of the customer to install said assembly or assemblies within ninety (90) days, shall constitute grounds for disconnecting water service to the premises until such assembly or assemblies have been properly installed. (Ord. 2009-12-1. Passed 2-9-10.)