Pipefitting, connector size not adjustable

[ReneBogersREBO]

Hi all,

I am building a pipefitting family (Transition), but can't adjust the connector size in family.

Other fittings I build work ok, but this one isn't. Can't see why.

This is a screenshot out of the family itself:

 

This is a screenshot out of the project:

In other families, the screenshot from family itself is the same, but the screenshot out of the project is like this:

So in the other families I can change the "NLRS_M_c01_diameter", but in my latest family I can't change the values of the connectors. Any clues?

[ReneBogersREBO]

The problem has to do something with the Part Type "Transition".

When changing "Transition" to "Union", then it works fine.

Any ideas, why Union makes de family ajustable by size and Transition Doesn't?

[Secttor]

It's mandatory having it as instance? Having it as type seems fine. (Category : Pipe Fittings ; Part Type : Transition)

[ReneBogersREBO]

Yes it's madatory yo have it as an instance, cause this parameter changes with different sizes. The lookuptable uses this variable, to pick the right row in lookuptable.

The other fittings where it works fine, use also an instance parameter instead of an type.

When switching to "UNION" instead of "TRANSITION" then the family diameter is changeable in the project, but as "TRANSITION" it isnt.

Could anyone tell me what is wrong if I make it a "UNION"? Can a UNION also been used between 2 connector with both different sizes? (I thought UNION needs 2 connectors with SAME sizes, but as I now found out, it's not necessary to have 2 same sizes.

Otherwise I change "TRANSITION" to "UNION" but I am not sure if that is a problem for other things (for example IFC-export)

[ryan.lenihan]

what is the workflow that you're trying to follow that you need to change the size of the transition? if you have a look at the OOTB revit families, they will act in the same what that you're experiencing with your own family.

transitions are designed to automatcally take on the size of the pipe that you're cuttint it into, there is no need to change the size. if you want to change the size of the transition, you have to change the size of the pipe that it's connecting into.

take the attached family for example, you cannot modify the size of the transition under the properties window, but it works just fine and adjusts as required depending on the pipe it is connected to.

[ReneBogersREBO]

When I start a new project, with the standard "Mechanical Template" and draw a pipe system (Standart Pipes) then I get the picture underneath.... here at my pc I can ajust the size of the fitting through the properties window.

This is different than yours, I find that strange???

[ryan.lenihan]

with a piping bend, you can change the size of the fitting and then revit will automatically add reducers/transitions between the fitting and the pipe.

my pipe bend below is the same, i can adjust the size of the fitting either through properties or through the size list on the ribbon and the reducer/transition is automatically dropped in.

if i've misunderstood your problem, and the actual problem is the transitions don't show up at all, then what you need to do is check your pipe routing preferences to ensure you have transitions families configured for your pipe type.

[ReneBogersREBO]

English is not my native language, so sometimes misunderstandings come around. hahaha

Thanks for your answers!

It's not the problem the transitions don't show up.

The problem is, that the transitions CAN't be changed manualy by the properties (cause they are greyed out).

The sollution for me is not declare them as "transition" but as "UNION". Then it works ok. I keep it that way for now, and if lateron problems happen because of this, then I change them back to "transition".