Underground Drainage Base - B&Q - MB450

The Polydrain MB450 chamber base is a versatile and durable foundation for 450mm inspection chambe...

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- 5 Way 450mm Underground Drainage Base For Inspection Chamber Set Circular Base For Manhole System Base Only

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B&Q - 5 Way 450mm Underground Drainage Base For Inspection Chamber Set Circular Base For Manhole System Base Only

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Product Information

Full details

The B&Q MB450 is a durable polypropylene chamber base designed for 450mm inspection chambers and 110mm underground drainage systems. It offers installers flexibility with multiple inlet/outlet positions and ensures compliance with relevant building regulations, making it ideal for various non-adoptable drainage projects. A key benefit is its ease of installation due to its lightweight yet strong construction, though it requires compatible risers and covers for a complete system.

All features

Model Part Number	MB450
Brand	B&Q

Extended Product Information

FAQs

What size drainage pipes is the MB450 compatible with?

The MB450 is designed for use with 110mm underground drainage pipes.

What is the maximum depth the MB450 can be used for?

The MB450 is suitable for inspection chambers up to 1.2 meters deep in non-adoptable applications.

Do I need to buy risers and covers separately?

Yes, the MB450 chamber base is designed to be used in conjunction with compatible Polydrain risers and 450mm access covers, which are sold separately.

Is the MB450 suitable for adopted sewers?

No, the MB450 is designed for non-adoptable applications and must comply with specific regional standards like SfA7 Type 4 in Wales.

What material is the MB450 made from?

The MB450 is manufactured from tough, durable polypropylene.

Can I seal unused ports without blanking plugs?

It is recommended to use the supplied blanking plugs to ensure a secure and compliant seal for any unused 110mm inlet or outlet positions.

Troubleshooting

Incomplete seal at pipe connection

Ensure the 110mm pipe is fully inserted into the port and that the connection is made with appropriate, compatible fittings. Check for any debris on the pipe or port sealing surface.

Water ingress through unused port

Verify that a blanking plug is firmly inserted into the unused 110mm port. Ensure the plug is the correct size and free from damage.

Chamber base unstable

Confirm the base is positioned on a firm, level, and compacted surface. Ensure the surrounding backfill is adequately compacted.

Riser not fitting securely

Ensure the correct Polydrain riser model is being used and that it is aligned correctly with the MB450 base before attempting to connect. Check for obstructions.

Pros and Cons

Pros

Lightweight yet strong polypropylene material for easy handling.
Flexible connection options with multiple 110mm ports.
Ensures compliance with key UK building regulations.
Adaptable to different site conditions with compatible risers and covers.
Quick and efficient installation process.

Cons

Requires separate purchase of risers and access covers.
Primarily designed for non-adoptable drainage systems.
Maximum recommended depth is 1.2m.
Potential for damage if subjected to excessive force during installation.

Setup, Compatibility & Care

Setup:

Prepare a firm, level base for the MB450 chamber base.
Position the MB450 on the prepared base.
Connect the 110mm drainage pipes to the desired inlet/outlet ports. Use appropriate fittings for a secure connection.
Install blanking plugs into any unused 110mm ports.
If a deeper chamber is required, attach a compatible Polydrain riser (e.g., D916) to the top of the MB450.
Secure the chosen 450mm access cover (circular or square) to the top of the riser or base as appropriate.

Compatibility:

Compatible with 110mm underground drainage pipes and fittings.
Designed for use with Polydrain risers.
Compatible with 450mm circular (e.g., CLKS452) and square (e.g., CLKS456) access covers.

Care:

The MB450 requires minimal maintenance. Periodically check for blockages in the drainage system.
Clean with a damp cloth if necessary. Avoid abrasive cleaners or solvents that could damage the polypropylene.
Ensure blanking plugs remain securely in place to prevent ingress of debris or water.