furnace question

I have a steam heating system and now that summer is here should I drain all the water out of the furnace? I don`t want any rust buildup inside. Am I thinking along the right path? Should I be doing something else? Thanks
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Yes drain, remove plugs, flush, use a hose inside flush clean, fill and run it to remove oxygen in water. Run at least a few cycles but maybe call the mnfg on that.
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<< should I drain all the water out of the furnace? >>
Why bother? The water in your boiler is as oxygen depleted as it can be. Adding more unboiled tap water later will only cause more rust buidup if that is your concern. Look at any old heating plant parts in a scrap yard and you will note that cast iron is quickly passsivated from corrosion by the continual recycling of the water. The system manufacturer will have literature to guide you if your service people can't provide one. Good luck.
Joe
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Why bother, because the crap-mud at the bottom will ruin a boiler in short order and cost thousands to fix.
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