Mike Lamb Posted March 26, 2021 Report Share Posted March 26, 2021 Does a dirty/opaque sight glass mean a steam boiler has not been flushed regularly? Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted March 27, 2021 Report Share Posted March 27, 2021 It could be, or the boiler has been drained and refilled or skimmed recently and they didn't bother to clean the glass. Dirty glass is usually way, way down the list of all the crap wrong with a majority of steam boiler installations. 1 Quote Link to comment Share on other sites More sharing options...
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