In all cases whereby a public water supply is connected, directly or indirectly, with any secondary water supply, sewer drain, conduit, pool, storage, reservoir, plumbing fixture or other device which contains or may contain any water, contaminated liquid or other waste of unknown or unsafe quality that could impart a contaminant or pollutant to the drinking water as a result of backflow caused by backpressure or back siphonage, a backflow device shall be installed and properly maintained by the customer in accordance with proper engineering practice and the requirements of the Indiana Department of Environmental Management. (Ord. 14-2021, 2021; prior code § 33-26)