French drain

A French drain is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area. The perforated pipe is called a weeping tile. When the pipe is draining, it "weeps", or exudes liquids.

It was named when drainpipes were made from terracotta tiles.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

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