Aggregates for Sewage Treatment Works


Specialist Materials for Drainage, Filtration & Structural Support 

Aggregates are essential in the construction, maintenance, and upgrading of sewage treatment works and wastewater infrastructure. At RedRox, we supply a wide range of certified aggregates used throughout these critical environments, from drainage layers to concrete bedding and structural fill. 

With reliable nationwide delivery across England, Scotland and Wales, we support everything from large-scale utility frameworks to regional upgrades and emergency repairs. 


Where Aggregates Are Used in Sewage Treatment Projects:


Drainage & Filtration Layers 

Aggregates such as clean gravel and specialist filter media are used to promote effective drainage and separation in treatment beds, percolation areas, and infiltration trenches. 

Washed, single-size gravels (e.g. 10mm, 20mm) ensure optimal permeability and prevent clogging. 

Pipe Bedding & Surround

Clean, angular aggregates are used to support and protect pipes within wastewater networks. 

We supply Type A, B, and C pipe bedding aggregates, including recycled options, to suit project specifications. 

Proper bedding ensures long-term durability and reduces the risk of pipe deformation or settlement. 

Structural Fill & Sub-base Construction

Sewage treatment works require stable platforms for tanks, chambers, and access roads. 

Aggregates such as MOT Type 1, 6F5, and granular fill are used for foundations, bases, and retaining structures. 

Concrete & Precast Production

Aggregates are a core ingredient in the production of precast units, wet wells, and cast-in-place structures. 

Supplied in certified mixes, our aggregates meet strict requirements for strength, consistency, and cleanliness. a


Aggregates

Key Benefits of Using Aggregates in Sewage Infrastructure:

Supports load-bearing structures such as tanks, kiosks, and concrete slabs

Enhances drainage and filtration, ensuring effective wastewater flow and treatment

Protects buried utilities from shifting and pressure

Reduces maintenance and risk of failure in high-load or corrosive environments

Improves ground stability around critical assets and access routes

We supply: 

  • Washed gravel (4/10mm, 10/20mm, 20/40mm) 
  • Type A, B, and C pipe bedding 
  • MOT Type 1 and 3 
  • 6F2 / 6F5 capping layers 
  • Recycled aggregates and EcoBlends 
  • Fill materials for lagoon lining, bund walls, and settlement areas 
  • Concrete and screed aggregates 

All materials are available loose or bagged, with delivery options including tipper trucks, grab wagons, and Moffett offload. 

Working on a sewage treatment project or utility framework?

Speak with our team today for expert guidance, compliance support, and efficient aggregate supply. 

Quarried Aggregates

RedRox supplies a comprehensive range of quarried aggregates, sourced from some of the most reputable and strategically located quarries across England, Scotland and Wales.

Recycled & Secondary Aggregates 

At RedRox, we are committed to promoting sustainable construction by offering a wide range of recycled and secondary aggregates as environmentally responsible alternatives to quarried products. 

Sub-Bases & Bulk Fills

At RedRox, we supply a full range of Series 800 compliant quarried sub-base aggregates, suitable for a wide variety of applications.

Rock Armour & Rip Rap Supply

RedRox supplies Rock Armour, also known as Rip Rap, across England, Scotland and Wales, offering one of the widest selections of stone types and sizes available in the UK.