Missing Flange Between Fitting and Transition (Reducer Fitting)

[fawzimasri7137]

Hello,

This is a Charlotte Cast-Iron No-Hub Family. It requires some kind of a Band as a coupling. Here i am using a Flange as that Band. And a Reducer as my transition Fitting.

In the image, you see that as i draw a pipe and change pipe size, Revit (2020) added a band between a Pipe and a the transition Fitting But not between a Fitting and the transition Fitting - in this case an Elbow and a Reducer.

In the field a band would be used there... by simply butting the Fitting to  a transition fitting with a Band around them.

So What drives the insertion of a Flange(Band)?

How can i fix the family or Routing Preferences to insert a Flange (Band) between Fittings and transition fittings?

[hmunsell]

a Flange will place between the pipe segment and a fitting,  but I don't believe a flange will place between 2 fittings. you would have to model it into the fitting, maybe as a visibility option. You can try placing them manually, but I haven't had good luck with that since they don't like to connect properly when placed manually. 

[fawzimasri7137]

So Revit looks only at whether it is a Fitting to a Pipe and then makes the decision to add a Flange?  nothing else influences that?

if i merge the flange with the fitting, then i would have to manually enable/disable visibility, or thru some macro, correct? i am worried it will be yet another thing that one could forget to do.

I wounder if it is better to add the flange using some kind of macro.

[iainsavage]

I had a similar issue with Victaulic fittings and ended up nesting the couplings into the pipe fittings with visibility parameters to control them in the few instances when there’s a fitting-to-fitting connection.

https://forums.autodesk.com/t5/revit-mep-forum/splitting-grooved-pipework-adds-2-couplings/td-p/1016...

There are some addons which will do this automatically but I they need to be paid for.