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Posted by Jeff on September 27, 2009 at 19:25:25:
I removed the sight glass to clean it, and there was about 1/2" of a rust colored sludge that had it plugged. There was sludge in the valve below the sight glass as well. I did not drain the boiler or close the valves (forgot, very bad) before I removed the sight glass. My thinking is this: That the sludge is in the valve, maybe beyond towards the tank. Any suggestion on how to go about this?
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