Description
Fernco AC4000 Adaptor Coupling 121-136mm/110-121mm
The Fernco AC4000 adaptor coupling is designed to connect pipes across different diameter ranges. This Adaptor Coupling provides a flexible connection between 121–136mm and 110–121mm pipe sizes, allowing transitions between mismatched systems. The Fernco AC4000 is suitable for underground drainage installations where a secure and adaptable joint is required.
Specifications
| Product type | Adaptor Coupling |
| Product code | Fernco AC4000 |
| Diameter range | 121–136mm / 110–121mm |
| Length | 160mm |
| Height | 160mm |
| Material | EPDM rubber with stainless steel clamps |
| Weight | 0.45kg |
Key design features
The Fernco AC4000 is designed to connect pipes across two different diameter ranges, enabling transition between 121–136mm and 110–121mm pipe sizes. The EPDM body accommodates tolerance variations between pipe materials within these ranges. Stainless steel clamps provide consistent compression across both ends to maintain a secure seal.
Benefits
- Allows connection between different pipe diameter ranges.
- EPDM construction supports flexibility during installation.
- Stainless steel clamps provide a secure and adjustable fit.
- Helps accommodate minor pipe misalignment during installation.
- Suitable for repair work and system modifications.
Applications
The Fernco AC4000 is used in underground drainage systems where pipes of different sizes need to be connected. This Adaptor Coupling is commonly installed in repair works, system upgrades, and extensions involving clay, PVC, or cast iron pipework. It provides a practical solution where direct pipe matching is not possible.
Explore more
Browse the full range of Fernco adaptor couplings and drainage fittings to find compatible connection solutions.
Contact us
For help selecting the correct Fernco AC4000 or confirming suitability for your project, contact the team for technical advice and UK wide supply.





