In this excerpt from his Dead Men’s Steam School seminar, Dan Holohan talks about boiler return traps. These were installed on vapor heating systems. There are still many of them out there and a lot of people get confused when they first see them. The name “trap” is deceiving, because it’s not a trap. It’s actually a mechanical condensate “pump” to put the returning condensate back into the boiler. They came in different shapes and sizes, but they all did the same thing.
Want to learn more? Read Dan Holohan’s book The Lost Art of Steam Heating Revisited.