How to Construct a Soakaway Pit?

Introduction

Are you looking to manage water runoff on your property? Constructing a soakaway pit might be the perfect solution. This practical guide will walk you through the steps to build your own soakaway pit, ensuring you have an efficient and environmentally friendly drainage system.

What is a Soakaway Pit?

A soakaway pit, also known simply as a soakaway, is an underground structure that allows water to percolate back into the soil. It helps in managing excess water from rainfall, downpipes, or surface water, preventing flooding and waterlogging.

Benefits of a Soakaway Pit

• Effective Drainage: Reduces surface water accumulation.
• Environmental Impact: Promotes natural water filtration and groundwater recharge.
• Cost-Effective: Low maintenance and long-lasting.
• Regulation Compliance: Meets local drainage regulations and standards.

Steps to Construct a Soakaway Pit

Step 1: Planning and Preparation

Assess Your Site

Before you start digging, assess your site’s suitability:

• Percolation Test: Dig a small test hole and fill it with water to observe how quickly it drains.
• Location: Choose a location at least 5 meters away from buildings and boundaries to avoid structural damage and disputes.

Gather Materials and Tools

You’ll need:

• Permeable geotextile fabric
• Gravel or crushed stone
• Perforated pipe (optional)
• Shovel, spade, and wheelbarrow
• Tape measure and level

Step 2: Digging the Pit

Mark the Area

Use stakes and string to outline the area where you’ll dig the pit. Typically, a soakaway pit is about 1 meter deep and 1 meter wide, but the size can vary based on your water management needs.

Start Digging

Begin digging within the marked area:

• Depth and Width: Aim for at least 1 meter deep and ensure the sides are straight.
• Base Level: Make sure the base is level for even water distribution.

Step 3: Lining the Pit

Install Geotextile Fabric

Line the pit with permeable geotextile fabric:

• Purpose: Prevents soil from clogging the gravel while allowing water to pass through.
• Installation: Ensure the fabric overlaps at the edges for full coverage.

Step 4: Filling the Pit

Add Gravel or Crushed Stone

Fill the pit with clean gravel or crushed stone:

• Layering: Start with a base layer of large stones, then add smaller gravel on top.
• Leveling: Ensure the gravel is evenly distributed and level with the top of the pit.

Step 5: Installing Perforated Pipe (Optional)

Lay the Pipe

For improved water distribution, you can lay a perforated pipe within the gravel:

• Positioning: Lay the pipe horizontally along the pit’s base before adding more gravel on top.
• Covering: Ensure the pipe is fully covered with gravel to prevent blockages.

Step 6: Covering the Pit

Fold Over Geotextile Fabric

Fold over the edges of the geotextile fabric to cover the top layer of gravel:

• Sealing: This helps keep the gravel in place and prevents soil ingress.

Backfill with Soil

Backfill the remaining space with excavated soil:

• Compacting: Lightly compact the soil to level it with the surrounding ground.

Step 7: Final Touches

Landscape Over the Pit

You can landscape over the soakaway pit to blend it with your garden or yard:

• Grass or Plants: Grow grass or plant shallow-rooted plants over the area.
• Avoid Heavy Loads: Keep heavy loads and structures away from the pit area to avoid damage.

Maintenance Tips

• Regular Inspection: Check the soakaway pit annually to ensure it’s functioning properly.
• Debris Removal: Clear any debris from the surface to prevent blockages.
• Water Flow: Monitor water flow into the pit during heavy rains to ensure it’s draining efficiently.

Conclusion

Constructing a soakaway pit is a straightforward and effective way to manage water runoff. By following these steps, you can create a reliable drainage system that protects your property and promotes environmental sustainability. For personalized advice or professional assistance, feel free to contact our team of drainage experts. Happy digging!