This will help keep dirt and roots from obstructing the system. Finally, infill the trench with gravel to grade. As an alternative, infill with gravel to a point a few inches below grade ...

This trench will have a perforated drain pipe in it and will be filled with clean washed stones or gravel that are the size of golf balls or slightly smaller, perhaps the size of a large glass marble.

A French drain is a trench filled with gravel or rock, containing a perforated pipe that redirects surface water and groundwater away from your property. This system helps prevent water from ...