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periodic maintenance

dking1dking1 Member Posts: 2
I am a homeowner (electrical contractor). About 3 years ago I installed a Revolution 4 Burnham boiler which I am very happy with. However due to mild weather I am just getting ready to start it up and I noticed what looks like some black fungus (small amount) in thr tubing. Can you recommend a corrosion /anti fungus chemical. It is running on distilled water.


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