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Professional Building Supplies£79.14Visit shop Floplast And Clark-Drain Floplast Inspection Chamber Set - 300Mm Diameter One Riser
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B&Q£113.59Visit shop B&Q - 300mm Mini Inspection Chamber Set With 200mm Riser And 35Kn Square Pvc Cover
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The 300mm Mini Inspection Chamber Set (D300MH) is designed for contractors and DIY homeowners requiring a reliable, lightweight drainage access point for domestic driveway applications. Its primary benefit is the modular, easy-to-install design that includes a 35kN load-rated cover, making it a robust solution for standard residential loads. While the system is highly versatile and durable, users should note that the risers require manual cutting to achieve specific depths if the standard 525mm clearance does not match the trench requirements perfectly.
| Model Part Number | D300MH |
|---|---|
| Brand | FloPlast and Clark-Drain |
The total depth from the invert to the top of the cover is 525mm.
No, the 35kN rating is specifically tested for domestic driveway traffic and is not suitable for heavy commercial or industrial use.
A fine-toothed saw is required to cut the PVC riser section to the desired length.
No, the side inlets come pre-blanked with integral plugs which should only be removed as needed for your specific drainage layout.
Yes, the set includes a 35kN load-rated square PVC cover and frame.
Trim the sectional riser using a fine-toothed saw to reduce the height or adjust the bedding layer beneath the chamber base.
Ensure the plugs are being pushed from the inside of the chamber; if stuck, gently tap the edge with a rubber mallet.
To ensure long-term performance, always place the inspection chamber on a compacted granular base to prevent future settlement. The system is compatible with standard domestic underground drainage pipework. When cutting the risers, ensure the cut is straight to maintain a watertight seal with the riser and cover assembly. Periodically check the cover for debris and ensure the frame remains flush with the surrounding driveway surface. Clean the interior channels with a drain rod or pressure washer if blockages occur, taking care not to damage the plastic inlet seals.
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