Agricultural Drain

1 min read Updated 6 Jul 2026 DrainSpy Brisbane
In short A slotted or perforated pipe (ag pipe) laid in gravel to collect groundwater and seepage, protecting retaining walls, foundations and soggy lawns.

Ag drains manage water in the soil rather than on the surface. The slotted pipe sits in a gravel-filled trench, usually wrapped in geotextile fabric, intercepting seepage and carrying it to a stormwater outlet.

They are essential behind retaining walls, where trapped water pressure is the leading cause of wall failure. Fine soil eventually clogs poorly wrapped systems — ag drains have a service life, not a forever guarantee.

What Is It For?

Collects subsurface water to protect structures and drain waterlogged ground.

Where You'll Find It

Behind retaining walls, beside footings, under lawns and gardens with drainage problems.

Common Problems

  • Silting where geotextile is missing or failed
  • Crushing under vehicle loads
  • Outlets buried or lost over time

How DrainSpy Brisbane Deals With It

A CCTV drain inspection is the standard way to confirm whether this is what's happening in your pipes: the camera shows the condition on screen, a locator pinpoints the exact position and depth, and you get a recorded report before any repair decisions are made.

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Suspect This Is Your Problem?

A CCTV drain inspection shows exactly what's happening inside your pipes — no guesswork.