Inspection chambers – also known as manholes – are a crucial aspect of any property’s drainage system. They allow drainage professionals to inspect and survey underground utilities and perform essential repairs and cleaning.
These access points are typically made up of three parts – a base, riser and cover.
The base is the bottom component that’s closest to the drain pipes. It has several inlets and accepts pipes with either a 110mm or 160mm diameter.
The riser is the mid-section of an inspection chamber and comes in various heights. This sits above the base and is connected with rubber seals. It has a corrugated exterior to simplify the installation process and can be cut to size using a saw.
The cover is required for safety purposes. Square or round, it covers the hole in the ground and protects the system from tampering and unwanted access.
What is an inspection chamber used for?
The primary purpose of an inspection chamber is to grant access to drainage and sewage systems, so they can be cleaned, cleared and inspected routinely.
These systems are designed to minimise the distance that inspection cameras need to travel – allowing surveys and inspections to be completed in less time.
On top of this, inspection chambers prevent people from being able to enter the drainage system without permission. Aside from eliminating the risk of them falling down the manhole, they also prevent objects and debris from getting into the drainage system and causing blockages.
Inspection chambers can be used as a temporary storage point for water. When used this way, excess liquid can build up in the drainage system, ultimately preventing flooding.
Where can an inspection chamber be used?
Inspection chambers can be installed wherever a branch pipe meets the main drainage run – providing easy access to the drainage system without needing to use numerous drain rods.
They’re helpful for when pipework changes direction horizontally by more than 30 degrees or when there is a change in pipe size. When two pipes come together at a junction of more than 45 degrees, an inspection chamber will allow a professional to inspect it safely and efficiently.
Inspection chambers can also be used where a straight run of piping extends more than 22m. And if the gradient changes, a system should be installed at the start and end point of the slope.
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When buying components for an inspection chamber, it pays to go to a reputable supplier who can provide you with the advice and guidance you need.
Build Plumb Plastics supply inspection chamber parts in a choice of inlet configurations and guarantee competitive pricing across their entire product range.
Their team is always on hand to help – ensuring you have all the information you need to make an informed purchase. If you have any questions or need an expert opinion, give them a call on 01255 258 525.
