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Brown water

JL_4
JL_4 Member Posts: 1
I have a home steam system with a hot water loop.
This season, I performed a full drain of the system, but unlike in past years when the water would stay clear, this year the water in the sight glass and in the boiler keeps turning brown. I have drained the system from both the pressure release valve and also from the very base of the boiler. But, after running the system for just a few hours it turns back to an almost coffee color. In prior years the sight glass would remain clear and would only have about ½ quart of brown water come out of the value during the weekly “blow down”.

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