What standard does this cover meet?

BS EN 124 Class B125, rated at 12.5 tonnes for driveway and light vehicle traffic.

Which chamber system does it work with?

It fits the FloPlast UGMBL 450mm chamber base and UGRL riser.

What load rating does this cover meet and where can it be used?

This cover complies with BS EN 124 Class B125 standards, making it suitable for driveways, footways, and light traffic areas with loads up to 125kN. It's not designed for main road use but handles typical domestic and light commercial traffic.

Does this cover fit directly onto existing 450mm inspection chambers?

This cover is specifically designed to fit the FloPlast 450mm chamber system (UGMBL + UGRL). For other chamber systems, you'll need to check compatibility as the frame dimensions may not align properly.

How does the plastic frame attach to the chamber and is it adjustable?

The reinforced polypropylene frame sits on top of the chamber rim and the cast iron cover sits within it. The frame itself isn't height-adjustable, so ensure your chamber is built to the correct finished level.

Is the cover tamper-resistant and how secure is it?

The cover features a tamper-resistant design that prevents easy removal without proper tools. However, it's not a locking cover, so if high security is needed, you may require additional measures.

What's the advantage of the plastic frame over a full cast iron unit?

The polypropylene frame is corrosion-resistant and lighter to handle during installation whilst still providing the strength of cast iron where load-bearing is critical. This combination reduces long-term maintenance compared to full cast iron systems.

Can this cover be installed at different angles or only level?

The cover should be installed level for proper load distribution and to ensure the cast iron lid sits correctly in the frame. Installing at an angle could compromise the seal and load-bearing capacity.

What tools are needed to lift this cover for maintenance access?

You'll need a proper manhole key or lifting tool that fits the recessed handles in the cast iron cover. Never attempt to lift using makeshift tools as this can damage the cover or cause injury.

How deep can the frame accommodate and does it need bedding in?

The frame should be bedded onto a mortar bed on the chamber rim to ensure even support and prevent rocking. Check the technical specifications for exact frame depth, but ensure it's set to finished ground level.

top of page

Fair Prices. Real People. Quality Plastics – No Compromises.
Small Item Postage Available – Only £8.99!

Email Us

HELP CENTRE

Your Nationwide uPVC Building Plastics Supplier

01922 254100

Fascias, Guttering, Windows & More

The 450mm Round Cast Iron Cover & Plastic Frame (MCCRCI) provides a high-strength, long-life access solution for 450mm inspection chambers.

This heavy-duty cover combines a corrosion-resistant cast iron lid with a reinforced polypropylene frame, making it ideal for driveways, light-traffic areas, and commercial use where added load capacity is required.

Designed to fit the 450mm chamber system (UGMBL + UGRL), it offers a secure, tamper-resistant seal and complies with BS EN 124 Class B125 standards.

Compatible with FloPlast and other standard underground drainage systems.