All backflow protection devices shall fully comply with all city requirements and shall be maintained by the property owner to provide for their continuing function as designed. All backflow protection devices shall be accessible at all times and shall be free from any obstructions, including, but not limited to, rocks, soil, vegetation, debris, grass, trees, bushes, plants, landscaping, concrete, asphalt, or other ground coverings or any other materials or substances that may impair the proper function of or unobstructed accessibility to the devices. (Ord. 13-03, 2013)