Question 1

What is Aggie Pipe?

Accepted Answer

Aggie Pipe (also called ag pipe, agi pipe, ag-line, or drain coil) is a flexible perforated subsurface drainage pipe used to collect and redirect groundwater away from structures such as retaining walls, gardens, and landscaped areas.

Question 2

Why is Aggie Pipe used in retaining walls?

Accepted Answer

It helps reduce hydrostatic pressure behind retaining walls by collecting water moving through the soil and directing it to a defined outlet, improving wall stability and longevity.

Question 3

What material is Aggie Pipe made from?

Accepted Answer

Aggie Pipe is typically made of corrugated high-density polyethylene (HDPE) or similar durable plastic, making it lightweight, flexible, corrosion-resistant, and suitable for underground installation.

Question 4

What does “slotted” mean in Aggie Pipe?

Accepted Answer

Slotted aggie pipe has small holes or slots along its length that allow groundwater to enter the pipe while leaving larger soil particles behind, enabling effective drainage.

Question 5

What is a “socked” Aggie Pipe?

Accepted Answer

A socked aggie pipe has a geotextile filter sleeve wrapped around it, preventing soil and fine particles from clogging the pipe while still allowing water to enter.

Question 6

What sizes of Aggie Pipe are commonly used for drainage?

Accepted Answer

Common diameters include 65 mm and 100 mm, with lengths available in coils (e.g., 20 m, 50 m, 100 m) depending on pipe brand and supplier.

Question 7

Can Aggie Pipe be used for general landscape drainage?

Accepted Answer

Yes. Aggie Pipe is also used in garden beds, sports fields, subsoil drainage under lawns or pathways, and around patios where water needs to be controlled.

Question 8

How does Aggie Pipe help prevent soil erosion?

Accepted Answer

By removing excess subsurface water and directing it away from soil slopes or structures, Aggie Pipe reduces water buildup that can cause soil erosion and instability.

Question 9

What is the difference between slotted and non-slotted pipes?

Accepted Answer

Slotted pipes allow water to enter from surrounding soil, while non-slotted (solid) pipes are used to carry water between points once collected.

Question 10

How should Aggie Pipe be installed behind a retaining wall?

Accepted Answer

It is typically installed in a trench at the base of the wall, surrounded by crushed rock or gravel, often overlaid with geotextile fabric to prevent soil intrusion.

Question 11

Do I need gravel with Aggie Pipe?

Accepted Answer

Yes. Gravel or coarse aggregate around the pipe helps channel water into the pipe and prevents fine soil from blocking drainage.

Question 12

Can Aggie Pipe be bent or shaped?

Accepted Answer

Yes. The corrugated plastic makes it flexible, allowing it to navigate curves or changes in direction in landscape or retaining wall drainage layouts.

Question 13

Is Aggie Pipe suitable for heavy-duty applications?

Accepted Answer

For general retaining wall and landscape drainage, standard slotted Aggie Pipe works well. Specialist high-stiffness variants may be required for heavier loads or deeper soil cover.

Question 14

How do I know what size pipe to use?

Accepted Answer

Pipe size depends on the expected water volume. Larger diameters can handle higher flow rates. For typical residential applications, 100 mm is commonly used.

Question 15

How do I order Aggie Pipe from BM Timber?

Accepted Answer

You can choose the desired diameter (e.g., 65 mm or 100 mm), length, and whether it is slotted or socked, then select pickup or delivery based on your project location and needs.

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