MEPSystemTypes
Dynamo Hierarchy: Rhythm>Revit>Selection>MEPSystemTypes
Description:
Selects a MEP System type from Revit to use
Inputs:
dropdown : MEPSystemTypes
Outputs:
MEPSystemTypes : String
Documentation now at
https://github.com/johnpierson/RhythmForDynamo/wiki/Documents

Dynamo Hierarchy: Rhythm>Revit>Selection>Collector>ElementsOfTypeInDocument
Description:
All elements of given type in the specified document. This works for unopened files and for linked documents.
Inputs:
document : Document
elementType: ElementType
Outputs:
elements : Element

Dynamo Hierarchy: Rhythm>Revit>Collector>Collector.PipesBySystem
Description:
This collects all pipes in the project and organizes them by System Classification
Inputs:
RunMe : bool
Outputs:
SystemTypes : UnknownElement
SystemClassifications : String
Pipes(GroupedBySystem) : Element