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Posted by HeatPro on October 28, 2004 at 16:44:44:
In Reply to: Flushing vs Skimming posted by Ted on October 28, 2004 at 11:29:53:
It is a good way to get rid of oil and floating debris on the top of the boiler water. Coatings on top of the water inhibit boiling and make the water burst through the coatings like a foam, making noise and splashing water into the mains so the water drops in level.