Pipe Diameter Behavioural Difference across Utility Modules

This documentation outlines how diameters are referenced and managed in the Water Reticulation and Storm Water modules within MiTS.

Water Reticulation Module #

Diameter Reference Behaviour #

In the Water Reticulation module:

• There are two diameter parameters: Outer Diameter and Inner Diameter

• These parameters are directly linked to the actual pipe dimensions used in the design

• The actual Water Pipe diameter (diameter under Spread Input) is referenced to the diameter listed in the Project Parameters (diameter in Project Parameters). This means that even if the inner and outer diameter are the same in between the two, it might still be a mismatch if the reference (i.e., the specific parameter record) is different

• If a mismatch exists between the actual diameter and the corresponding Project Parameters reference, a verification error will be triggered during analysis

• This error can also be reviewed in the Verification Panel

Example

Even when a user edits the diameter values in the Project Parameters to match a deleted pipe diameter (e.g., both having 310mm outer and 290mm inner diameter), the system might still treat them as different if the pipe diameter in the Spread Input was initially linked to the previous deleted reference. Simply updating the parameter value in the Project Parameters does not automatically update the reference in the Spread Input.

Sample Project File HERE

1. Analyse Project File

• Open the project file and navigate to the Water Reticulation module

• Analyse the project

• Analysis successful

2. Delete the diameter used under the Spread Input in the Project Parameters

• Go back to the Input Screen

• Open Project Parameters using the Command Line bar

• Navigate to Water Reticulation > Diameter > UPVC

• Delete the diameter used in the spread input, (outer == 310mm; inner == 290mm) and click OK

• Re-analyse the project

• Verification error triggered

3. Re-input the same diameter as the previously deleted diameter

• Open Project Parameters using the Command Line bar

• Navigate to Water Reticulation > Diameter > UPVC

• Re-input a new diameter similar to the previously deleted diameter
  • Inner diameter: 290mm
  • Outer diameter: 310mm

• Click OK and re-analyse the project

• Verification error triggered

4. Solution

• Change the pipe diameter to another diameter (e.g., 300mm)

• Change the pipe diameter back to 310mm

• Re-analyse the project

• Analysis successful

Storm Water Module #

Diameter Reference Behaviour #

In the Storm Water module:

• The diameter listed under Project Parameters functions as a template

• When a user picks a dimension from the list as per below, then the dimension is being duplicated, so the user can easily just changed the dimension on the drain or delete the original dimension in the Project Parameters; i.e., it’s not linked with the dimension in the Project Parameters, hence no above error

Sewerage Module #

Diameter Reference Behaviour #

In the Sewerage module:

• The diameter used in the Spread Input is not editable directly, in contrast to the Storm Water module, where users can freely modify the drain dimension

• If a diameter used under the Spread Input is deleted in the Project Parameters, it will still remain visible and in use within the Spread Input
  • MiTS allows the analysis to proceed without any verification error, even though the deleted diameter no longer exists in the Project Parameters list
  • Unlike the Water Reticulation module, which requires a strict reference to the Project Parameters and triggers a verification error if the reference is broken, the Sewerage module does not enforce this validation