Chamber Rings and Soakaways

Marshalls Water Management offers a comprehensive range of precast concrete manhole rings engineered to meet the highest quality and durability standards.

These precast concrete chamber rings are manufactured with tongue and groove joints for quick and easy chamber installation and are compliant with relevant regulations, including BS EN 1917:2002 and BS 5911-3:2010.

Our concrete manhole rings are produced in controlled factory conditions, ensuring exceptional consistency and a premium finish.

Available in various sizes and configurations, they are tailored to meet the specific needs of your project, helping you save time and reduce costs on-site.

What are the design options?

Our soakaway units achieve a minimum area of exfiltration of 50,000mm² per metre of nominal diameter per metre of depth, enabling natural ground infiltration.

These soakaways are available in 500mm, 750mm and 1000mm depths from 900mm to 3000mm diameter and 750mm and 1000mm depths in 3660mm and 4000mm depths. All soakaway holes are 75mm in diameter.

Marshalls' cover slabs are available with standard and special access to meet your project's needs.

Manhole chamber sections are supplied with three nominal 50mm diameter holes for lifting purposes.

Suitable lifting bolts, which come with an appropriate test certificate, can be purchased through Marshalls.

Designers and users must ensure they have considered the current requirements for manhole access, as detailed in the Health and Safety Code of Practice, Regulations and Guidance issued by the Health and Safety Executive under the Confined Spaces Regulations 1997 and other relevant requirements.

Delivery options

Lorries with crane offload facilities are available upon request for manhole units, including DN3000. Our manhole installation guide provides details on installing manholes.

Download the EPD for Cover Slabs.

Why choose Marshalls' concrete manhole rings?

Marshalls combines over 100 years of expertise with cutting-edge manufacturing techniques to deliver solutions you can trust. Our manhole rings are made in the UK using responsibly sourced materials and adhere to strict quality standards.

• Reduced excavation time with a cast-in base option
• Bespoke holes and cut-outs prefabricated in your chamber for on-site manhole construction
• Chamber sections are created to your requirements, with or without double steps or an integrated ladder. Double steps available to comply with BS EN 13101
• All chamber sections are loaded and delivered 'chimney fashion' intended for offloading the same way
• Assured compliance - our products comply with the British Standard and are kitemarked except the 3660mm and 4000mm, which comply with all the relevant provisions of the European Standard.
• Seamlessly integrate our concrete manhole chamber rings into your designs with our BIM models
• A range of overall depths
• Easy site offloading with Crane offloading available up to DN3000 diameter upon request