Brett Martin 450mm Diameter Chamber Riser 325mm Invert

Key Highlights

• Simple Push-Fit Jointing: Fast, tool-free vertical stacking using rubber sealing rings for watertight integrity.

• Ribbed Outer Structure: High structural integrity designed to withstand backfill and load forces without deforming.

• Site-Adjustable: Easily cut down to custom heights without compromising joint functionality.

• Fully Compliant: Meets UK Building Regulations Part H1 standards when properly assembled.

• Corrosion-Resistant Plastic: Non-degrading polypropylene designed for long underground service life.

Raise your underground drainage inspection access to surface level easily using the Brett Martin 450mm Diameter Chamber Riser (B5397).Engineered as a modular mid-section for domestic and commercial drainage assemblies, this unit sits between your chamber base and cover frame to achieve the precise height required on site.

Constructed from robust, lightweight polypropylene, the B5397 features external reinforcement ribs that resist soil pressures and lateral ground movement.The integrated jointing lip allows fast push-fit assembly, saving installation time while maintaining watertight seals when paired with rubber ring seals.

If custom heights are required, the riser can be easily cut to size on site using standard handsaws.When installed as part of a complete Brett Martin chamber system (base, riser, reducer, and frame), the assembly fully complies with Building Regulations Part H1 for domestic drainage access.

Note on Invert Depth: "Invert depth" refers to the vertical distance from the top of the unit to the invert level (bottom of the inside pipework).For deep installations exceeding 1.2 meters, ensure a standard chamber reducer (B6350) is incorporated in line with standard UK building regulations.

Technical Specifications

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