Rigid Permeable Drain Pipe

What a rigid permeable drain pipe is

A rigid permeable drain pipe (plastic blind ditch) is a filament-wound PE permeable core that takes in groundwater through its open mesh. The upper ~2/3 of the pipe is perforated and permeable for fast intake, while the closed lower ~1/3 stops water leaking back into the soil — preventing the secondary leakage that loosens the surrounding ground. Often wrapped with a nonwoven geotextile filter, it works as a rigid alternative to a flexible perforated land drainage pipe.

Where it is used

This rigid perforated pipe is used for subsurface drainage, retaining-wall back drainage, sports-field and road-base drainage. It drains water away quickly to avoid soil erosion, adapts to a wide temperature range, and resists ageing and chemicals for a long service life. Because it is lightweight it is easy to transport and install on site. For a flexible double-wall alternative see our corrugated drainage pipe, and for behind-wall flow it pairs with a geonet drainage layer.

Specification and sizing

There is no single public or statutory standard (AASHTO, ASTM or GB) that governs this filament-wound blind-ditch permeable pipe; products are made to manufacturer specifications and may be supplied as national-standard or non-standard grades. Diameter, open ratio, compressive strength and discharge capacity are therefore product-specific — contact us with your project flow and depth and we will return SIGMA datasheet values with the test method named for each figure.

Rigid permeable pipe vs flexible perforated drainage pipe

A conventional perforated drainage pipe — a slotted land drainage pipe or perforated PVC pipe — relies on small holes or slots that can clog over time. This filament-wound rigid permeable pipe is open across its whole upper face like a fine mesh, so it takes in groundwater faster and is less prone to blocking than a hole-and-slot perforated pipe. As a rigid perforated drain pipe it keeps its shape under backfill where a flexible land-drain coil might deform, and an optional geotextile wrap turns it into a self-filtering drain.

Where it is used and how it installs

Per the source application list this rigid permeable pipe is used in railway and highway construction, airport runways, golf courses, football fields and large lawns, landscaping, landfills, slope and retaining-wall drainage, and tunnels — anywhere a large-scale drainage project must remove groundwater quickly. It installs like any land drain: lay it in a gravel-filled trench (optionally geotextile-wrapped), with the closed base down and the permeable face up, then connect to an outfall or a corrugated drainage pipe collector. As a perforated drain pipe for a retaining wall it runs along the footing to relieve back-of-wall water pressure.