Drainage Gravel Recycled 20mm Bag

Description

Recycled Drainage Gravel 20mm

Manage large volumes of water effectively with Recycled Drainage Gravel 20mm, a coarse aggregate designed for high-flow drainage, retaining walls and bulk backfill applications.

Produced from crushed recycled concrete, this material is screened to a consistent 20mm size, creating larger void spaces that allow rapid water movement, making it ideal for heavy-duty drainage at a more affordable price point.

Available Sizes (Recycled Range)

This product is available in multiple recycled sizes to suit different applications:

• 10mm Recycled Drainage Gravel — Ideal for general drainage and pipe backfill
• 20mm Recycled Drainage Gravel — Best for bulk drainage and retaining wall backfill
• 40mm Recycled Drainage Gravel — Suitable for high-flow, large-scale drainage areas

Key Features & Benefits

Cost-effective heavy-duty drainage — A more affordable alternative to natural 20mm drainage gravel.

High-flow performance — Larger stone size creates maximum void space for fast water movement.

Environmentally friendly — Made from recycled concrete, reducing landfill and supporting sustainable construction.

Strong and durable — Suitable for load-bearing and structural drainage applications.

Versatile use — Can be used across drainage, construction and landscaping projects.

What It’s Used For

Behind Retaining Walls — The most common use, helping relieve water pressure and prevent structural damage.

Drainage Trenches & Pits — Ideal for high-capacity water movement and dispersion.

Soak Wells & Stormwater Systems — Suitable for managing large volumes of water.

Backfilling & Bulk Fill — Perfect for trenches, foundations and underground services.

Driveways & Site Access Areas — Can be used where drainage and stability are both required.

Why It Performs Well

Recycled Drainage Gravel 20mm performs effectively due to its coarse particle size and angular shape, allowing it to:

• Create large voids for rapid water flow
• Prevent clogging in high-flow conditions
• Maintain structural support under load
• Reduce water pressure behind retaining walls

This makes it a practical solution for heavy-duty drainage where performance and cost both matter.

Important Product Characteristics

Recycled concrete material — May include mixed colours, textures and minor impurities due to its origin.

Variable appearance — Not suitable for decorative areas where a consistent finish is required.

May produce dust — Some fine material may be present during delivery or installation.

Best for non-visible applications — Ideal for behind walls, trenches and underground drainage systems.

Installation Tips

• Use behind retaining walls to relieve hydrostatic pressure
• Combine with ag pipe and geofabric for optimal drainage performance
• Install to appropriate depth depending on application
• Avoid over-compaction to maintain void space for water flow

Practical Information

This product is supplied as a bulk material, with delivery options including Bulka Bags (1m³) for sites with restricted access.

Due to the recycled nature of the product, colour, texture and composition may vary between batches, which is normal.

Dimension of empty bag – 700mmx400mm

1 x bag = 16.65 Litres (which amounts to 0.017m3)

60 x Bag = 1m3 of product.

We have 2 option with bagging products.

1 – Bag your own, We supply the bags and tools to bag your own product from our bins.

2 – We bag for you, We will bag the products that you require in the same bag.