How to Install a French Drain - This Old House
https://www.thisoldhouse.com/plumbing/21328906/french-drain-installation
WEBFrench drains collect unwanted surface water, preventing flooding of lawns, patios, walkways, and drives. French drains divert ground water, drying lawns and foundations. They are simplest to build during construction of a house but can be added later. Little to no maintenance is required.
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