Comprehensive Retrofit Solutions

Equipment ages, becomes obsolete, or new and improved technology comes along. Koester has been involved with retrofitting equipment for more than half a century and is ready to assist you to meet your specific needs.

  • Energy efficiency projects
  • Electrical controls and instrumentation
  • Treatment systems
  • Pumping stations and systems
  • Clarification
  • Chemical feed systems
  • Dewatering
  • Aeration and blowers