You can make tubes with the Follow Me tool or you can install a plugin to make this process just a wee bit easier.
Tubes with Follow Me
- Open SketchUp.
- Make two clicks. move tool to center and pull up to create an arc. Click to accept changes.
- Click last endpoint and drag. A new arc will form—the curve will act as a sine wave. Double click to accept form.
- Draw a circle at one end of the curve.
- Select the curve with the Select Tool (spacebar).
- Select the Follow Me tool and click on the face of the circle
- Triple click on the form and select Reverse Faces from the Context Menu
With an extension
- Navigate to the Extension Warehouse
- Search for tube and select the Shapes extension
- Install the extension
- You will find the Shapes under the draw menu
Now what?
- Create a model with Tubes.