One of the most commonly asked questions we receive is, “Isn’t the filter fabric (geotextile used around Turf Drain and Perma Basins) going to clog up?” In the early 80’s, when we first introduced Turf Drain to the golf course industry, I called on golf course architect, Joe Finger in Houston. Joe was a civil engineer. As soon as I showed him the Turf Drain and explained how it worked, he said, “I have never seen a filter yet that didn’t clog up and have to be replaced.” I wasn’t able to counter his statement, but as soon as I left his office, I started my search for the explanation. Since that time, I have spent untold man-hours trying …