The riser or manhole shaft with steps is part of the Corfit manhole assembly and is used with the base and top cone to adjust height and invert depth. Heights are as listed under the Riser row of the manhole part table.

Key features

• Socket, spigot and side inlet connections with rubber sealing ring
• Resistant to floating due to ribs and collar provided on external surface of riser/shaft
• Abrasion resistant
• Smooth inside invert surface for high hydraulic capacity
• Chemical resistant
• About 2° slope provided for gravity flow in inspection chamber base
• Light weight
• Resistant to acids, bases and organic compounds, including sulphuric acid and hydrogen sulphide found in sewers

Applications

• Commercial and municipal sewerage/drainage networks

Specifications

Material: PE (Polyethylene) | Manufacturing Standard: BS EN 13598 1 & 2 (BS EN 13598-2 for manhole chamber) | Assembly Components: Cone/Dome with steps; Profile rubber gasket; Riser/Manhole shaft with steps; Base | Height Adjustment Note: For height / invert depth adjustment, use combination of riser and top cone

Standards: BS EN 13598-1 | BS EN 13598-2