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e., weeping tile surrounded by sand or gravel, and geotextile or landscaping textile. Landscaping fabrics prevent migration of the drain material and also avoid soil and roots from entering and clogging the pipeline. Check For Updates perforated pipe supplies a minor below ground volume of storage for water, yet the prime purpose is drainage of the area along the complete length of the pipe via its perforations and to discharge any surplus water at its terminus.

Subsurface drain systems have been utilized typically for centuries. They have lots of forms that are similar in design and function to the traditional French drain. Drainage system structure [edit] Variations of French drain include: Call Description Curtain drain This form makes up a perforated pipe surrounded by gravel. It is similar to the conventional French drain, the gravel or aggregate product of which reaches the surface area of the ground and is revealed to allow collection of water, except that a drape drain does not reach the surface area and rather is covered by soil, in which turf lawn or other plants might be planted, so that the drain is concealed.

Collector drain This form combines drain of groundwater and interception of surface area water or run water, and may connect into the underground pipelines so as to rapidly divert surface water; it preferably has a cleanable filter to avoid migration of surface particles to the subterranean location that would block the pipes.

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Fin drain This form consists of a subterranean perforated pipeline from which extends perpendicularly up along its length a thin vertical area, denominated the "fin", of aggregate product for drainage to the pipe. The length is 200 mm (7. 9 in). This type is less costly to construct than a traditional French drain.

e., open at a downhill slope, dry well, or rain garden where plants soak up and hold the drained pipes water. This is useful if city water supply or other wastewater areas are unavailable. Sizing factors to consider [edit] Cross-section view revealing French drain with two underground pipes. Depending on the anticipated level and volume of water or runoff, French drains pipes can be expanded or likewise established on 2 or 3 underground drain pipelines.