One embodiment of a spiral tube base that has an outer covering of a geogrid material or a geotextile material. The spiral tube base is typically made of a hard, durable material, such as PVC pipe, so that it can be buried within the earth and can be used in a variety of areas and soil conditions. Geogrid material or fiberglass grid material is wrapped around the outside of the spiral tube. The geogrid material and the spiral ribs allow liquids or effluent to gather within the tube, while the geogrid openings and the spiral openings of the tube allow effluent to move from within the tube into the surrounding soil. One opening of the spiral tube base can be covered with an inlet plate that holds an intake-pipe cap and provides an entrance for a pipe from a septic tank. A distal opening of a leaching tube or the distal opening in a continuous line of leaching tubes that are connected together can be covered with an end plate. Other embodiments are described.