470mm Inspection Chamber Raising Piece – uPVC Drainage Extension

The 470mm inspection chamber raising piece is a vital component in underground drainage installations, designed to increase the height of a 470mm diameter inspection chamber so that the cover reaches the finished ground level. This allows for easier access when inspecting and maintaining the drainage system without disturbance to the surrounding surface.

Manufactured from durable uPVC, this chamber riser is built to withstand moisture and underground conditions while requiring minimal upkeep. Its robust construction ensures consistent performance in both domestic and commercial applications where effective drainage access is needed.

Key Features & Benefits

• Extension piece specifically sized for 470mm inspection chambers
• Strong uPVC material for reliable performance underground
• Enhances access for maintenance and inspection tasks
• Simple push-fit installation with seal for watertight connection
• Resistant to rot, moisture and environmental wear
• Suitable for drainage systems in residential or commercial settings

Installer Benefits

• Lightweight design for easier handling on site
• Can be stacked with additional raising pieces if needed
• Compatible with standard inspection chamber bases and covers
• Promotes correct chamber height to match ground level
• Minimal maintenance once installed

Application

• Underground drainage inspection chamber height extension
• Suitable for sewerage and gravity drainage systems
• Use with standard 110mm pipework and chamber bases

Performance & Durability

Built from quality uPVC, this chamber raising piece is resistant to corrosion and long-term exposure to moisture, making it ideal for below-ground applications. The material retains its structural integrity over time and requires no painting or special maintenance to remain effective.

By increasing the chamber height, this riser helps ensure that access points sit flush with ground level, providing safe and convenient access for inspections when needed without needless excavation or disruption.

Installation

This raising piece is installed on top of an existing 470mm inspection chamber base. Fit the supplied seal to the end of the riser and push it into place to create a secure and watertight joint. Additional raising pieces can be stacked if a greater extension is required.

Product Specifications

• Material: uPVC
• Diameter: 470mm
• Height Increase: Approx. 235mm
• Colour: Black
• Application: Underground drainage inspection chamber extension
• Compatibility: Standard 110mm drainage systems