Specifications include, but are not limited to: 1.1. Sewer Cleaning Sewer cleaning shall be performed by the hydroflushing method. Methods that employ buckets, porcupines, kites, scooters, balls, pigs, snakes, or other winch or rod-propelled devices or tools shall not be used. B. The Contractor shall use self contained hydroflushing equipment. At a minimum the equipment shall have cleaning tools suitable for use in gravity sewers from 6 to 24 inches in diameter. The allowable sewer cleaning tools shall include Enz Bulldog nozzle or Warthog rotating nozzle. Use of other nozzles or cleaning tools requires the advance approval of the City. C. The Contractor will be responsible for obtaining all water and water meter(s) necessary for the performance of the work. This includes the cost of water. Recycled water will be allowed if the equipment is equipped with an approved recycled water system to be used for sanitary sewer cleaning and sewer maintenance purposes.