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This Underground Inspection Chamber Restrictor Ring (also known as a Reducer Ring) is designed to reduce the opening of 450mm inspection chambers to 350mm diameter. It is suitable for use with 450mm chamber bases, including B5494 and B5696, helping create a smaller access point while maintaining compatibility with the chamber system.
The ring is easy to install and can be fitted to any 450mm chamber base, regardless of the chamber depth or invert level. It is commonly used where the chamber depth exceeds 1 metre (1000mm), helping to provide a more practical and secure access size.
Ideal for underground drainage systems, this restrictor ring forms part of a complete inspection chamber setup, which may include the chamber base, risers, sealing rings, and a suitable cover and frame.
FAQs
What types of building materials do you supply in Wolverhampton?
We stock a wide range of materials, including bricks, blocks, cement, plasterboards, insulation, roofing, drainage, lintels, metalwork, damp-proofing, and more — perfect for DIY, self-build, and professional projects.
Can trade professionals and DIY customers buy from Carvers?
Yes, Carvers Building Supplies welcomes both trade customers and DIY enthusiasts across Wolverhampton, Telford, Shropshire, Staffordshire, and surrounding areas.
Do you offer delivery for building materials?
Yes, we provide reliable local delivery throughout Wolverhampton and the Midlands. We can deliver everything from bricks and blocks to timber and roofing materials. Please view our delivery information.
Can you advise on which materials are best for my project?
Absolutely — our experienced team in Wolverhampton can guide you on the right materials for house building, renovations, roofing, timber floors, and drainage projects.
Are your materials suitable for large-scale builds?
Yes, we supply materials for both small renovations and large construction projects, including self-build homes and commercial developments.
How do I place an order or check stock availability?
You can browse our range online, call our Wolverhampton branch, or submit an enquiry using the form — we’ll help you source exactly what you need.
Which areas do you supply outside Wolverhampton?
We supply Birmingham, Walsall, Dudley, Bilston, Stafford, Shrewsbury, Telford and the wider West Midlands. Click here to view our delivery information.
Do you supply roofing materials?
Yes, we stock roof tiles, roof windows, felts, and ventilation products, suitable for residential and commercial roofing projects across the Midlands.
Do you supply timber and timber-related products?
Yes, we provide structural timber, joists, I-beams, insulation, and related fixings, ideal for floors, roofs, and home improvements.
Can I get drainage materials and outdoor essentials?
Yes, we supply underground pipes, manholes, soakaways, and commercial drainage products — everything needed for reliable drainage and groundwork.
Where can I get building materials near me?
Visit our Wolverhampton branch on Littles Lane, WV1 1JY, or contact us online — we proudly serve customers across Wolverhampton, Dudley Telford, Shropshire, Staffordshire, and surrounding areas.
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