http://www.ezflowlp.com/frames/frproducts.html http://xrl.us/rjr9 This appears to be a heaven sent method of making drainage for a backyard, plus other uses. I encountered it on a tour recently in a local newspaper. It seems using EzFlow would save a lot of work with drainage problems. This could be useful for a poorly drained garden area. One simply digs a trench and installs the pipes without the added complication and work of using gravel. I have no idea of the cost. Has anybody used this system? Durgan.