Manholes and Inspection Chambers

A correctly installed inspection chamber will be essential for clearing blockages, reducing the possibility of costly repair work in future. As a vital access point for maintaining underground drainage, every part of the drainage system should be accessible from the inspection chamber or rodding eye.

Manhole Covers and Chamber Covers

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

Inspection Chamber Sizes

300mm diameter inspection chambers 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.

450mm diameter inspection chambers are the standard for rodding and cleaning domestic underground drainage. You can use these chambers at any depth up to 3m, although remember to add a chamber reducing ring to your basket for anything greater than 1.2m in depth.

We also stock underground drainage supplies. Also, Explore our plastic manhole set by visiting here.

Read More
  • 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.