What Type of 1 Pipe system do we have

JohnWest

We have a 1917 Courthouse with 2 Clearfire Steam Boilers in the Basement.
The condensate Returns from the Radiators to a Holding tank in the Basement.
Would this be a wet Return?

Charlie from wmass

what returns are return lines below the water level of the boiler usually there are exceptions when false water lines need to be used due to a change in water line with the new boiler