6‑inch Cast Iron to Plastic Adaptor

The 6‑inch cast iron to plastic adaptor is designed to provide a secure transition between traditional 6″ cast iron drainage and modern plastic underground drainage systems. This adaptor helps ensure a watertight joint between different materials, making it ideal for renovation, repair, extension or upgrade projects.

Constructed with a flexible rubber body and reinforced uPVC ends, this adaptor accommodates slight misalignment and differences in pipe surface texture. Its robust design makes it suitable for use in underground drainage systems, while the lightweight construction simplifies handling and installation on site.

Cast Iron to Plastic Adaptor – Key Features & Benefits

• Connects 6″ cast iron pipework to plastic drainage (typically 160mm)
• Flexible rubber and uPVC construction for strength and resilience
• Provides a secure and watertight joint between dissimilar materials
• Designed for underground drainage applications
• Lightweight for easier installation
• Ideal for domestic and commercial drainage systems

Installer Benefits

• Flexible design accommodates slight pipe misalignment
• Quick and secure installation with minimal tools
• Helps reduce labour time compared to rigid connections
• Secure seal helps prevent leaks and joint failure
• Low maintenance once installed

Applications

• Connecting older cast iron systems to new plastic drainage
• Drainage upgrades and extension projects
• Domestic and commercial underground drainage networks
• Sewer and surface water runoff connections

Performance & Durability

This adaptor is engineered to perform reliably in underground drainage environments, offering resilience to moisture, soil movement, vibration and general wear. The flexible rubber body helps conform to irregular cast iron surfaces, while the uPVC ends provide strength and resistance to corrosion and ground conditions.

By providing a secure connection between cast iron and plastic pipework, this adaptor helps maintain efficient water flow and reduces the likelihood of leaks at transition points, ensuring long term performance.

Installation

The adaptor should be installed in accordance with the overall drainage layout and current building regulations. Ensure both pipe ends are clean and cut square. Slide the adaptor onto the cast iron pipe first and then onto the plastic pipe, tightening clamp bands or seals to create a watertight connection.

Product Specifications

• Material: Flexible rubber body with uPVC ends
• Cast Iron Size: 6″
• Plastic Pipe Size: Typically 160mm
• Application: Underground drainage
• Compatibility: Cast iron and plastic pipework
• Function: Transitional adaptor
• Colour: Black