Route properties include the type of routing (piping, tubing or electrical) and the diameter or size of the route.
The start component determines the initial values for the route properties.
For example, when you start the route with an electrical component (that is, the connection point route type is electrical), the route properties are set to electrical.
If the start component is a pipe component with a certain diameter, the route type is set to piping and the diameter property to the same value as the start component.
You cannot change the pipe diameter, because that would create a pipe that does not match the start component. However, you can override other attributes such as the pipe specification.
To change the diameter of a route, use the Change Route Diameter command from the Routing Tools menu.