Revit pipes type change


It is not possible to change the type of pipes in several systems at once in revit. Therefore, the described addin was created.

In “Revit pipes type change” post:

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Revit pipe type change – program idea

The program for changing the type of pipes allows you to replace selected pipes and fittings with another type. When can you use it?

  1. You transfer calculation results from other programs, but their pipes and fittings are incompatible with those used by you
  2. You have to change many types of pipes at one time

How program works

First, the program will ask you to select all the pipe elements that you want to change, and after selecting, confirm with the “finish” button.

In the second step, we have to choose the type of pipes we want to change our installations to.

After selecting the type, the elements in the model will be replaced. When the program is finished, you can close the results window.

Film with program in action

Source code – revit pipes type change

Below is the program code from the first version of the overlay. For more please visit mine GitHub, where new versions of the overlay will appear on a regular basis.

Copyright (C) 2022 Paweł Kińczyk
## Imports

from Autodesk.Revit.UI.Selection import *
from Autodesk.Revit.DB import *
from pyrevit import forms
from rpw import revit

# Get revit model
doc = revit.doc
uidoc = revit.uidoc

# Class and def
class CustomISelectionFilter(ISelectionFilter):
    def __init__(self, nom_categorie):
        self.nom_categorie = nom_categorie

    def AllowElement(self, e):
        if e.Category.Name in self.nom_categorie:
            # if self.nom_categorie.Contains(e.Category.Name):
            # if e.Category.Name == self.nom_categorie:
            return True
            return False

    def AllowReference(self, ref, point):
        return True

def get_dict_of_elements(build_in_category):
    elements = FilteredElementCollector(doc).OfCategory(
    return {Element.Name.GetValue(e): e for e in elements}

# Picking elements
with forms.WarningBar(title="Pick elements in model[pipes/pipe fittings]"):
    collector = uidoc.Selection.PickObjects(
        ObjectType.Element, CustomISelectionFilter("Pipes Pipe Fittings"))

# Get pipe types
pipe_types_dict = get_dict_of_elements(BuiltInCategory.OST_PipeCurves)

# Chose pipe type you want to change
pipe_type_name =, message='Select pipe type',

# Get routing preference
if pipe_type_name == None:
    forms.alert("You didn't pick any pipe type", exitscript=True)
    raise Exception("You didn't pick any pipe type")

pipe_type = pipe_types_dict[pipe_type_name]
rpm = pipe_type.RoutingPreferenceManager
rc = RoutingConditions(RoutingPreferenceErrorLevel.None)

# Clear unuse elements
del pipe_types_dict

# Sort elements pipe fittings/pipes
collector_fittings = []
collector_pipes = []
for element in collector:
    element_category = doc.GetElement(
    if element_category == "Pipes":

# Clear unuse elements
del collector

transaction = Transaction(doc, 'Batch change pipe - PYLAB')

# for loop through picked elements
for element in collector_pipes:

        print('it is a Pipe')
        element = doc.GetElement(element)
    except Exception as e:
        print("Pipe error")

for element in collector_fittings:
    refs = []
        element = doc.GetElement(element)
        fitting = element
        element = element.MEPModel

        # Get info about connected elements
        connectors = element.ConnectorManager.Connectors

        size_fit = float(0)
        for c in connectors:
            for r in c.AllRefs:
                c_size = float(r.Owner.LookupParameter("Size").AsString()[0:3])
                if size_fit <= c_size:
                    size_fit = c_size


        pipe_fitting = element.PartType

        # Get routing preference MEPPartId
        if pipe_fitting == PartType.Elbow:
            print('it is an Elbow')
            new_fitting_id = rpm.GetMEPPartId(
            part_fitting_id = rpm.GetRule(
            part_fitting_id = part_fitting_id.MEPPartId

        elif pipe_fitting == PartType.Tee:
            print('it is a Tee')
            new_fitting_id = rpm.GetMEPPartId(
                RoutingPreferenceRuleGroupType.Junctions, rc)
        elif pipe_fitting == PartType.Cross:
            print('it is a Cross')
            new_fitting_id = rpm.GetMEPPartId(
                RoutingPreferenceRuleGroupType.Crosses, rc)
        elif pipe_fitting == PartType.Transition:
            print('it is a Transition')
            new_fitting_id = rpm.GetMEPPartId(
                RoutingPreferenceRuleGroupType.Transitions, rc)
            new_fitting_id = None
            print('current fitting id: {}'.format(fitting.GetTypeId()))

        if (new_fitting_id
                and fitting.Id != new_fitting_id
                and new_fitting_id.IntegerValue != -1):
    except Exception as e:
        print("Fitting error")


Please report any irregularities in the operation of the program that occur during use on my social accounts or account GitHub.b.

See also:

Paweł Kińczyk
Paweł Kińczyk
Articles: 66


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