Additional Information on Manhole Covers
There are several different types of manhole cover and frame products for a range of applications, from plastic, cast iron, galvanised steel or composite products all at different prices. Feel free to search through our categories in which the manhole covers have been sorted to make finding the correct manhole covers, tools or products easy for you.
Manhole cover and frame products are a valuable construction element that provides several functions for many applications. Usually fitted onto an inspection chamber, the products enable maintenance workers to gain access to telecom lines and underground drain pipes or an inspection chamber. Additionally, they serve as access points for meters that quantify the flow of liquid in the effluent pipes.
Manholes have to be covered using manhole covers to shield anything or anybody from falling in the manholes, inspection chamber or drain and keeping out unwanted materials and unauthorised persons out of the inspection chamber.
Weight classes for manhole covers products are as follows:
A15 - 1.5 tonne loading.
Very light duty for pedestrian areas such as pedestrian driveways, patios, gardens or pedestrian foot paths or to cover a small drain or inspection chamber. Usually made from plastic or galvanised steel. Usually the lowest price manhole cover. Most recessed covers for block paving are A15.
B125 12.5 tonne loading.
Light duty. Ideal for occasional light pedestrian traffic with domestic pedestrian driveway thresholds. Cover for a manhole or drain or inspection chamber. Usually galvanised steel, ductile iron or composite. Mid price.
C250 - 25 tonne loading.
Medium Duty. Perfect for lightly trafficked areas with slow-moving vans and cars and services, some recessed covers for block paving available. Usually ductile iron or cast iron, galvanised steel or composite material. Mid price depending on size.
D400 - 40 tonne loading.
Heavy Duty. Suitable for heavily trafficked areas, highways, and main roads such as public car parks
E600 - 60 tonne loading.
Heavy Duty. Recommended for heavy-duty areas like warehouse applications, loading bays and industrial estates. Usually come at a high price.
F900 - 90 tonne loading.
Extreme heavy-duty applications such as airports and docks, usually come with a higher price tag.
Tips Before Buying:
Over the years the cover will wear out, they become weak because of exposure to the elements. The products eventually break, especially if they’re made of plastic or steel.
Broken drain covers allow drain odours to leak from drainage systems and are risky for vehicles and pedestrians, so the products must be replaced.
Here are the key factors to consider when buying replacement drain covers:
All manhole cover manufacturers use a similar technique to measure their covers: They are classified by their clear opening size, which is the size of the opening that they’re made to conceal.
For security reasons, it’s imperative that the replacement manhole cover is fit for the purpose and loading capacity required, and this boils down to the areas that the drain covers are to be fitted, and the traffic in the area.
Plastic, Ductile Iron or Steel?
As long as you stick to the guidelines as mentioned above, the decision is yours. Traditionally most manhole covers were made from ductile iron, but with modern-day advanced technology, the options are unlimited, and offer similar loading performance.
Galvanised steel manhole covers are easily installed and lightweight but can be rated up to 17 tonnes, so they are very versatile. On the flip side, cast iron and plastic manhole cover and frames are dark in colour, so they’re perfect drain covers for tarmacked driveways. Once you find out the correct weight loading capacity and size the choice is yours! Plastic or galvanised steel manhole lids are usually the cheapest option.
Plastic Inspection Chambers, Drain Covers and Access Covers
For those who own new properties, there is a high probability that the manhole cover might be on top of plastic inspection chambers as opposed to brick manholes.
In such instances the width of the chambers must be measured, placing a tape measure across the inside – it’ll most likely be round. Then all that is required is to search for and buy manhole covers and frames to suit the size of the manhole chambers (usually 450mm).
Another thing to keep in mind is that you still have to ensure your drain cover is of the correct weight class when mounted on a plastic chamber!
Block Paving and Patios
A Recessed manhole cover is just a metal tray that lets you lay out a slab or block paving inside to match the surrounding area. Usually made from galvanised steel recessed manhole covers are also available in different loads and sizes, so if you’re having your driveway block paved, replace your cover around the same time - just ensure that your recessed drain cover is of the right weight class.
Installation Tips and Hints
Once the correct drain cover and frame and material have been sourced a builder, drain installer or other capable person should install the drain covers. The drain covers and frame should be bedded in concrete and levelled correctly. The concrete should be allowed to cure for at least three days before any weight is put on to the drain covers and frame.
Can a square cover be fitted into a circular chamber?
Yes, there’re a few covers that are round to square, meaning they’ll fit in round or square chambers. These covers include the 300SR, and the T1G3, to name a few.
Why did a forklift break my heavy-duty manhole lid?
Well, a forklift has rock-hard wheels, which exert pressure differently to typical pneumatic, so your cover frame must be specifically designed to suit this.
How do I know which size I need?
All sizes are measured by the clear openings inside the frames, as this is the only true constant between manufacturers’ designs.
I have the correct measurements of my clear opening size, but I can’t find a match, why?
This is because your manhole cover is old-fashioned and in imperial measurements. However, we can provide custom-made solutions with covers made to the exact specs you need, including the correct load rating.
Can you give me any pointers on the installation process?
If you’re still hesitant after reading this comprehensive guide, feel free to get in touch with us. Search for our contact page to contact us.
I need access through my manhole covers regularly, is this possible?
Of course, most covers have inbuilt lift keys. However, the best way to get easy access is to order custom-made, hinged covers. Which is one of the services we can offer.
How does an access cover differ from a recessed cover?
Since they’re very similar products, most folks find themselves wondering what the difference is. Well, each has its own unique advantages and can be used for a range of different purposes.
Manhole covers are generally used to securely and safely hide the entrance of drains and other chambers. They're often made from concrete, galvanised steel manhole covers, ductile iron or cast iron or even a combination of several of other materials.
On the flip side, access covers are usually found on internal floors, driveways, car parks, foot ways, pavements, and roads. Their purpose is to protect pedestrians from falling in man-made holes and providing workers with access to below ground services.
Why are manhole covers circular?
Some possible explanations include:
- A Circular cover doesn’t have to be rotated or precisely aligned when placing it on the opening.
- A Round casting is much easier to make using a lathe.
- It’s easier to dig circular holes.
- Round covers can be easily rolled or moved.
- Unlike square covers, round covers cannot fall through the circular openings, whereas square covers could fall in if they were installed diagonally.
Is anti modern slavery part of your policy terms conditions?
Yes. We’re dedicated to ensuring that there is no trace modern slavery and human trafficking in our supply chains or any part of our business.
What is damp proofing?
Damp proofing is a general term that covers treatments and techniques employed to prevent damp from being absorbed through floors or walls into the interior of a property.
Order Manhole Covers at EasyMerchant Today
Here at EasyMerchant, we keep a wide range of Manhole Cover and frames and all necessary tools intended for any application including inspection chambers and surface boxes for services, in all the common material including, steel manhole lids, cast iron and plastic. Round, square and recessed. We have all load capacity ratings from domestic all the way up to F900 for use in docks and airports. We also have all thicknesses and sizes carefully chosen from the leading manufacturers and brands in the industry today. We try to offer the highest possible products and services at the best possible price
To view the products in this category simply visit and search the sub-category pages above, we keep most sizes including 450mm, 600mm, 600 x 450mm and lots of major brands such as Eccles, Naylor, Clark Drain and more.