Fixture Units equal zero

[engrodriggo2]

I am trying to get the Fixture Units parameter to make calculations in a cold and hot water system. However, in the section of pipe connected to the mixing valve (Please see the image) and towards the shower the FU value is equal to zero. Does anyone know why FU is not being calculated correctly.

   

[jeremy_tammik]

Are you doing anything programmatically yourself, or just using the standard Revit user interface?

If you are not doing anything programmatically yourself using the Revit API, I am afraid this is not the best place to ask such a question.

Please note that this discussion forum is dedicated to programming Revit using the Revit API.

For a question such as yours relating to a built-in Revit MEP system calculation, you might be better served in the non-API Revit MEP discussion forum:

https://forums.autodesk.com/t5/revit-api-forum/this-forum-is-for-revit-api-programming-questions-not...

The people there are much better equipped to address this topic than us programming nerds.

I hope this clarifies.

Thank you for your cooperation and understanding.

Best regards,

Jeremy

[engrodriggo2]

Hi Jeremy, thank you for reply. 

I am doing an addin, but you are right. This is much more a pure mep question than api. I gonna repost It in the other group. 

Thank you.