S Shelton New Member Messages 3 Reaction score 0 Points 0 Jan 6, 2009 #41 jadnashua said: While I don't know for sure, an auto-fill valve on a steam boiler would require some fancy controls to prevent it from overfilling the system. It isn't a problem with a hydronic system, since it should always be full; as steam boiler shouldn't. Click to expand... What happens if the system overfills? There may not be an auto-fill valve. I'm not positive.
jadnashua said: While I don't know for sure, an auto-fill valve on a steam boiler would require some fancy controls to prevent it from overfilling the system. It isn't a problem with a hydronic system, since it should always be full; as steam boiler shouldn't. Click to expand... What happens if the system overfills? There may not be an auto-fill valve. I'm not positive.
