need a cummin diesel expert

was needing to know what the canister under the turbo on a 95 Dodge with a cummins is called.

Has heater hose hook up on the front of it. Thought it could be the heater for the cooling system (got one that is kind of like that on the backhoe) then thought it might be for the fuel heater. But I'm just guessing. Have to see about getting a new one to replace this one. Would be nice to know what the he*l it is

My repair manual does not show it so I thought someone here might have a cummins and know what it is.