NDS EZ-Drain Mesh w/ Pipe Ring Tight 8 in. x 10 ft.. NDS gravel free French Drain products can be used as a substitution for a traditional gravel French drain. They consist of fabric, lightweight gravel substitute, and pipe all in one package. The NDS French drain can be installed anywhere a traditional French Drain can is installed plus areas where access is limited or heavy gravel can't be easily installed. The NDS French Drain is a prefabricated trench drain that is a gravel free option to a traditional French drain. It cuts installation time in half by eliminating the need to transport, shovel and move heavy gravel. It is made of 3 or 4 slotted corrugated pipe, surrounded by NDS poly-rock, and wrapped in a geotextile fabric. It's durable, crush-proof and has a 100-year lifespan. The NDS French Drain has been designed to take water out of the soil and pipe it to a safe discharge point like an NDS Flo-Well or Pop-Up emitter.