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Burnham 406 2 or 1 pipe to feed the main?
I have a single pipe system, natural gas converted from coal, probably in the 60s or 70s. I had a steam guy look at my system the other day and as he was thumbing through the manual and he said the system should have two steam pipes feeding the system, not one (as it's currently configured). He said the one pipe configuration is for if the boiler is being used for hot water instead of steam. The system works as is but has a number of bugs. Any opinions on feeding the second pipe into the header? The picture attached shows a plug that was under a knockout in the boiler casing. Wondering if it's worth doing the job. Thanks !