per maintenance on one steam boiler checked burners and standing pilot the system is unsafe to operate due to safety concerns as the relief valve is compromised and also the sight glass and it is not possible to remove the pressuretroll left system off as for safety concerns and issues Will have to replace the sight glass and repipe the pressuretroll (extended)reseal the chimney where the flue pipe goes in and replace the relief valve discussed the is plus the age of the system with homeowner and recommend a replacement of the boiler View visual findings from this job here - https://visionshare.xoi.io/?id=XA-213F-86614DA913514B62A9FF40F7B5125929