The Brett Martin B5397 is a 450mm Inspection Chamber Riser, designed to extend the height of underground inspection chambers in drainage systems.

🔧 Key Features

• Diameter: 450mm
• Invert Depth: 325mm (distance from top to bottom of inlet pipe)
• Material: Robust, ribbed polypropylene for strength and stability
• Connection: Push-fit with rubber seals for watertight joints
• Function: Sits atop the chamber base to raise the inspection cover to ground level
• Adjustability: Can be cut to size or stacked with other risers
• Compliance: Meets Building Regulations Part H1 when assembled correctly

This riser is ideal for shallow access chambers and can be used in combination with other components like chamber bases, covers, and reducers to build a complete inspection system.

Need help planning a full chamber setup or calculating how many risers you'll need? We can help with that too.