I'm hoping that the gearheads around here can help me with a part ID. I've got a `96 B2300, and I'm trying to ID the pipe that fits into the the water pump on one end, and has hoses running to both the lower portion of the radiator as well as to the firewall. It's hard to re-order a part when one doesn't know what the part is called.

Thanks in advance for any help that you can provide.

 

Attached, hopefully, is a pic of the part. Hopefully that will help.

 

You said it runs To the lower radiator hose and the firewall it's probably just a split so the water can run to the water pump as well as the heater core I am not sure what the technical term is for it but I can look it up and let you know

 

I'm not sure what it might be called by a dealer either, but I'm sure if you described it to the parts counter person that they would be able to properly figure it out. Most catalogs (mostly online these days) offer pictures or illustrations.
In the parts catalog its probably simply called a "tube assembly," or perhaps a lower radiator tube assem.