Hardscape & GradingPregunta 49 de 100
A French drain is BEST described as what?
a.A surface concrete channel
b.A raised planter box
c.A type of retaining wall
d.A gravel-filled trench with a perforated pipe that collects and redirects subsurface water
Explicación
A French drain is a trench filled with gravel around a perforated pipe that intercepts subsurface and surface water and carries it to a discharge point. Water enters the pipe through the perforations and flows by gravity away from the problem area. It is used to relieve soggy soils and protect foundations.
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