Technical Uno 1100 heater

[UnoMia]

Hi Everyone,
Can anyone help me with a photo of the three way pipe that sits in the engine bay, near the bulk head and supplies water to the heater and also to the inlet manifold?
I've searched online for this part but as I don't know what it's called in the Fiat parts list I've not found anything.
I removed mine years ago because it was broken and I didn't bother with the heater but I'd like to reconnect it now and that three way pipe has long since disappeared.
Thanks so much for any help.

 

[s130]

There are many many Uno's and 1100 models. You need to tells us ideally your full VIN or at least the exact model reference code from your chassis plate.