State and Federal regulations require that these devices be tested and inspected at least annually by the water department in accordance with the city’s cross-connection control program. Maryville Municipal Code, Chapter 3, Title 18, Section 18-304 (T), requires that irrigation backflow devices be installed and have water service up to the number 2 shutoff valve of the backflow device no later than May 1st of each year and remain in service until September 30th to allow for these required annual inspections and tests. Devices not installed, or not in service will result in return trips and re-inspection fees being assessed to the customer’s utility account. Customers with questions can contact the Maryville Water and Sewer department, Monday through Friday, 7:30 a.m. to 4:00 p.m. at 273-3304.