The fluids travel through flexible plastic/rubber 'tubing'.
We 'go tubing' on the river every summer.
(..) Follow me. I'll show you. - You serious? - Yes. All right. Too much water for the condenser tray or the heat exchange tubing. This has got to be the fill line. That's the only thing that makes any sense. Can you fix it? No, not tonight. (..)2012 The Amazing Spider-Man