Irrigation Pipe Work. The Landmark tool set has an Irrigation Line tool, but if you do not have Landmark, what can you do? The answer is to use a polygon, polyline or standard line tool, and assign these to a special class. We can use the class to control the graphic style, and we can also use the class to quantify the lines to give us overall lengths. If you use a class for each pipe size, you can qualify each type of pipe.