Inspect the drain pipe outlet and any above-ground inlets like downspouts that areSend a plumber's snake into the drainpipe's inlet if there is one accessible aboveExcavate the drain pipe and trench surrounding the pipe.Pile the materialsLift the drain pipe out of the ground.If possible,move it far enough away from theClean the drain pipe out using a combination of strong blasts of water with a hoseRinse all silt and debris off of the gravel that was removed earlier if you will reuse,Reshape the bottom and sides of the trench,if needed.As a general rule,theLine the trench with landscaping cloth or filter fabric.Place the cleaned drain pipe in the center of the reshaped,lined trench.Make sureFill in the space around and on top of the drain pipe with at least 12 inches of