In this video tutorial, I show you how to draw hoses and pipes using the free BezierSpline plugin by Fredo6. You might already know how to use the Follow Me tool to extrude shapes, but the trick to creating smooth, curved pipes is to place temporary guides at each end to help you place the bezier control points.
Full Written Tutorial http://mastersketchup.com/sketchup-hose-and-piping-tutorial/
BezierSpline by Fredo6 - http://sketchucation.com/pluginstore?pln=BezierSpline
SketchUp team’s bezier plugin - https://extensions.sketchup.com/en/content/bezier-curve-tool