The D-Drain from DeWitt is a modular drainage composite and collection system consisting of a three dimensional, high flow drainage core which is wrapped with a non-woven filter fabric. It is designed to replace a conventional sand or gravel covered pipe drain around building foundations and retaining walls. Soil particles are held back by the filter fabric allowing water to pass through to the drain core for easy flow of water from the unwanted site to the desired location. A full array of custom fittings are available in the system to allow for fast and easy installation.