Get Elbow's Min. and Max. Size values from a Pipe Type's routing preference.

[ncircle_a4]

How to get and set the values of Min. Size and Max. Size of any elbow which is set as a rule in a pipe type's routing preference.
Please check the snap attached from Revit.

 

[jeremy_tammik]

Look at the explanation of API access to routing preferences in the developer guide:

• https://help.autodesk.com/view/RVT/2025/ENU/?guid=Revit_API_Revit_API_Developers_Guide_Discipline_Sp...

[ncircle_a4]

@jeremy_tammik Thank you for your prompt response.
When I tried the same solution as you proposed, the segment for index 1 (elbow) was null when type casted. Please see the code snippet below.
However, this solution is working perfectly fine for index 0.

for (int index = 0; index < 11; index++)
                {
                    var groupType = (RoutingPreferenceRuleGroupType)index;
                    var noOfRules = startPipeType.RoutingPreferenceManager
                        .GetNumberOfRules(groupType);

                    for (int i = 0; i < noOfRules; i++)
                    {
                        var rule = startPipeType.
                            RoutingPreferenceManager.
                            GetRule(groupType, i);
                        Segment segment = doc.GetElement(rule.MEPPartId) as Segment;
                        if (segment != null)
                        {

                        }
                    }
                }