Abstract: A drainage apparatus is utilized in combination with a hollow core concrete block having a notch extending through one longitudinal wall thereof, to allow water to escape the hollow core. In the preferred embodiment of the invention, a fabric pocket is held upright within the hollow core by a wire frame. The lower end of the wire frame is bent into a J-shape so as to clip onto the concrete block at the notch in the block. The fabric is of a type which will absorb water and permit a high water flow rate, so as to drain water from the surrounding material downwardly through the fabric and out the notch. A second embodiment of the invention utilizes a hollow tubular frame within a fabric pocket. The tubular frame has a plurality of slots cut therein to allow water to seep into the tube and be drained out through the notch in the concrete block.