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Irwins supply only premium grade Welsh Anthracite. It is designed so that the larger anthracite particles are at the top of the filter and the smaller sand particles are at the bottom of the filter.

This has several advantages over a single media filter. It results in increased filtration rates, longer filter run times and reduced backwash water consumption. It is used in water filtration for the removal of algae, turbidity and bacteria.

A bed of anthracite placed on top of the sand layer provides the filter with larger grain particles to the surface of the filter which delays binding and pressure drop across the filter. It also provides a larger reservoir in which the floc may be held before backwashing.

Technical information

  • Anthracite Grade 1
  • Anthracite Grade 2


  • Grade 1 0.8-1.4mm
  • Grade 2 1.2-2.5mm

Quality Products & Quality Service

Irwins Quality Aggregates offer one of the most extensive ranges of decorative aggregates in Ireland. Irwins can offer a large range of dry dash render stones available with accompanying sands.

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Shipping & Returns Policy

Irwins do not deliver bagged products to private houses. We rely on our network of Builders Merchants throughout Ireland. We can deliver bulk loads for contracts and merchants. Loose bulk loads can be delivered direct if required.

Irwins Quality Aggregates without prejudice, operate a NO RETURNS POLICY for all bagged & Bulk Deliveries. Note: Agreed exceptional returns will incur a 25% Handling Charge

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Working to Standards

ISO 9001 and ISO 14001 Registered Company.

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