steam boiler

Old 10-24-09, 07:33 AM
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steam boiler

I want to flush out a steam residential boiler.I openned up the drain valve by the bottom of the unit but no water flowed out?
shouldnt it simply drain (gravity)or do i introduce air like a hot water boiler.
Old 10-24-09, 07:51 AM
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Stick a short screwdriver in there.

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