Manipulating Autofittingoptions.xml

Navigate to the data folder inside the active project to find AutoFittingOptions.xml.

Open AutoFittingOptions.xml in a text or an XML editor.

Find the lines that define Standard Angle values for HVAC elbow.

<Elbow name="Angle">
		<StandardAngle value="30" />
		<StandardAngle value="45" />
		<StandardAngle value="60" />
		<StandardAngle value="90" />
</Elbow>

Copy and paste one of the angle definition lines and change the value to 75.

<Elbow name="Angle">
		<StandardAngle value="30" />
		<StandardAngle value="45" />
		<StandardAngle value="60" />
		<StandardAngle value="75" />
		<StandardAngle value="90" />
</Elbow>

Save the changes, and close the editor.

Revoke the Device Hookup tool. The hookup tool contains additional Connection Angle value.

Hookup path and finish for Custom Elbow Angle 75°

Set the Connection Angle to 75° and continue hookup. The elbow instance in the hookup run inherits the angle property as defined in the Autofittingoptions.xml.

Elbow in hookup run shows Angle 75° in Rectangular Elbow Parameters

Note: For plumbing fittings, the same procedure of editing AutoFittingOptions.xml for angle values of elbows in the plumbing discipline is followed.