Brett Martin 280mm Diameter Shallow Access Chamber Square Double Seal Lid (lid 300x300)

Key Features & Benefits

• Double-Seal Technology: Dual rubber seal prevents drainage odours from escaping and seals against surface water ingress.
• Paving-Friendly Design: 300x300mm square top simplifies paving and slab integration around the chamber.
• Durable Polypropylene Construction: Resistant to corrosion, impacts, and weather wear for long-lasting underground performance.
• Regulatory Compliance: Fully satisfies UK Building Regulations Part H1 for shallow inspection chambers (up to 600mm invert depth).
• Lightweight & Easy to Handle: Quick to fit for both professional contractors and DIYers.

Installation Tip: Apply copper-impregnated grease to the lid retaining screws during initial installation. This prevents thread corrosion and guarantees smooth screw removal whenever inspection or maintenance is required down the line.

Complete your underground drainage layout with the Brett Martin 280mm Shallow Access Chamber Square Double Seal Lid (B2802).Designed for domestic pedestrian applications—such as patios, block paving, garden paths, and walkways—this frame and lid assembly provides a clean, airtight finish for shallow inspection networks.

Featuring a 300x300mm square frame profile, this unit eliminates the tedious, circular cuts required by traditional round covers, saving time for block pavers and landscapers during installation. Its integrated double-seal technology creates an airtight barrier that effectively retains foul drainage odours while keeping surface water, dirt, and external debris out of the chamber.

Manufactured from heavy-duty, UV-stabilized polypropylene, the B2802 is fully compliant with BS EN 13598-1 and satisfies Building Regulations Part H1 when installed with compatible 280mm chamber bases and risers.

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