I performed maintenance on a Weil-McLain EG-45 Steam Boiler. The service involved draining and cleaning the boiler to remove sediment, inspecting and sealing joints, and checking the pressuretrol settings for optimal operation. I also replaced the sight glass and conducted a combustion efficiency test with a Bacharach Fyrite analyzer. The system was then refilled, and a thorough operational test was conducted to ensure peak performance.