Automatically assign downstream Node IDs to upstream pipes

Discussion created by blendt on Feb 9, 2012
Latest reply on May 4, 2017 by ajohnson3223
I was wondering if there was a tool in which you can assign the ID of a manhole to all manholes (or pipes) that connect upstream.  To illustrate, I have have a backbone representation of a sewer network for hydraulic modeling purposes.  I would like to automatically assign the IDs of modeled manholes along the backbone network to non-modeled manholes that connect downstream to a modeled manhole.   Hopefully the attached image illustrates my question. 

Thanks in advance!