Our manhole covers and inspection chamber covers are available in a range of plastic and galvanised steel and in load-bearing classes from pedestrian to driveways, car parks and highways. If you are replacing a broken chamber cover and need a particular item then please call our sales team on 01255 258525 to arrange a suitable replacement.

Our  inspection chambers sizes are available from 300mm diameter which can be effective up to a depth of 600mm. These mini access chambers are usually located close to the house and therefore near the top of the drain.

Larger, 450mm diameter inspection chambers are standard for rodding and cleaning domestic underground drainage and can be used at any depth up to 3m. Please remember to add a chamber reducing ring to your basket for any system deeper than 1.2m.

If you are looking for plastic manhole sets then do please explore our range by visiting here. We also stock a full range of underground drainage supplies which have a next day delivery option so, please search our online catalogue.

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  • What is an inspection chamber?
    An inspection chamber is a manhole, or underground access point, that drains from one side to the other. It holds a series of pipes connecting household drains and outlets so that waste materials can be easily removed from the home. The inspection chamber allows for easy access in case of clogs or blockages, making it essential for proper maintenance of a plumbing system.
  • Where do you need an inspection chamber?
    An inspection chamber is typically required in any drainage system where two or more pipes join together. These chambers allow for easy access to the pipes so that maintenance can be performed, such as clearing a blockage or repairing a leaking joint.
  • Why is the inspection chamber used?
    This access chamber can be used to identify any blockages or signs of damage, enabling any necessary repairs to be carried out quickly and safely.
  • What is the minimum depth of an inspection chamber?
    The minimum depth of an inspection chamber should be 600mm deep and have a diameter of at least 300mm, with additional clearances on all sides.
  • What are the different types of inspection chambers?
    Inspection chambers are manufactured in two main materials: High-Density Polyethylene plastic (HDPE) and precast concrete. These can come in four different styles of chamber, including standard concrete rings, wide wall concrete rings, pre benched concrete chambers and prefabricated HDPE chambers.