Drawing line features using fixed angles

I have been googling this but I don't think I am using the right terms to get what I am looking for. I work for a water/waste water utility and we have fittings that determine the angle a pipe turns from another pipe, just like the plumbing in your home. What I am looking for is a tool that gives me a series of fixed angles, 90°, 45°, 22.5°, 11.25°, etc, so that when I select this angle I am only allowed to draw a line at the specified angle off the line I am snapped to, or off the previous line segment. Anyone know of any tools that are predefined to accomplish this, or know of away I can set something up?