French drains are typically covered with pea gravel and a fabric filter to prevent dirt from clogging the drain line. They are also called trench drains, perimeter drains or curtain drains.

Typically, French drains constitute a trench containing a perforated pipe filled with gravel. The surface or underground ...

In garden beds, gravel helps water flow away from the roots of your plants. In French drains, gravel enables water to enter a perforated pipe and escape to a drainage point while keeping out ...

In contrast, a French drain installation is below ground as a perimeter drain around the basement or entire foundation. It uses a perforated pipe surrounded by filter fabric and gravel to capture ...