A. Check valves shall be installed in customer service laterals as close as practicable to the meter. The customer shall also install and maintain such additional pressure reducing valves, pressure relief valves, check valves, pop-off valves, or other control valves as the director of public works may direct to protect the customer’s plumbing from abnormal high or low pressures or from interruptions of service.

B. The director of public works shall establish and enforce such rules and regulations as are necessary to prevent the backflow of water into city mains. The rules and regulations shall be approved by the council. Compliance with the backflow rules and regulations shall be a condition of receiving water service from the city, and violation thereof shall be deemed a violation of this chapter. (Prior code § 3.225)