Drainage Metal Products

Scoria - SAP 25/7

Scoria - SAP 25/7

Scoria – SAP 7

Scoria – SAP 7

SCORIA (SAP 25/7 or SAP 7)

At Composting New Zealand, we stock two scoria products to meet your project’s needs.

A porous, lightweight material with high strength to weight ratio, scoria is commonly used under pipes * and drain coil, with the Scoria 25/7 able to be used as a backfill for retaining walls.

Other uses include levelling under paving stones and concrete.

Landscapers sometimes choose to mix this product with our garden mix due to the fantastic drainage properties of scoria.

*Please note the SAP 7 should not be put against pipes with holes in as the finer pieces may block the holes. products are manufactured for backfills, soakage trenches and general drainage applications.

Pea Metal


Pea metal (crushed greywacke rock) is a popular alternative covering for driveways, or as a decorative surface in gardens and borders.

Priced competitively, pea metal is also a product that only requires a shallow application (2cm) when implemented as a protective driveway cover, resulting in even more cost saving.


Pea metal is also commonly used as a drainage and filtration fill.

Horse Friendly

Pea meal also makes a great surface material for horse pens and stable beds as it is comfortable for the horses and friendly to their hooves.

How much will I need

To help you work out your quantities, please click through to our Quantity Calculator.  You’re welcome!