Description
SML BG Ductile Pipe Coupling
The SML BG Ductile Iron Pipe Coupling is designed to create secure, watertight joints within below ground cast iron drainage systems. Manufactured from ductile iron and fitted with stainless steel twin screw clamps, the coupling provides reliable connection performance for socketless SML pipe installations. Its robust construction supports long term durability in underground drainage environments while allowing fast installation without welding or specialist tooling.
Specifications
| Product type | Ductile iron pipe coupling |
| Range | SML Below Ground Drainage |
| Material | Ductile iron with stainless steel clamps |
| Finish | Epoxy coated |
| Diameter range | 50mm–400mm |
| Connection type | Socketless coupling |
| Compatibility | SML below ground cast iron drainage systems |
| Certifications | CE Marked, BBA Certified, Kitemark approved to BS EN 877 |
Key design features
The Ductile Iron Coupling uses a socketless connection design to simplify installation within below ground cast iron drainage systems. Stainless steel twin screw clamps provide even clamping pressure around the pipe joint to support watertight performance. The epoxy coated ductile iron body improves corrosion resistance in buried drainage environments while maintaining long term structural durability.
Benefits
- Provides secure watertight connections within underground drainage systems.
- Ductile iron construction delivers strength and impact resistance.
- Twin screw clamp arrangement supports stable jointing performance.
- Epoxy coating improves resistance to corrosion and environmental exposure.
- Suitable for a wide range of SML below ground drainage applications.
Applications
This Ductile Iron Pipe Coupling is used to connect socketless cast iron drainage pipework within underground soil, waste, and sewer systems. The coupling is suitable for commercial, residential, and infrastructure drainage projects where durable cast iron pipe connections are required.
Explore more
Browse the full range of SML drainage pipes, fittings, couplings, and cast iron drainage components to complete your installation.
Contact us
For help selecting the correct coupling size or confirming compatibility of the Harmer Ductile Iron Coupling with your drainage system, contact the team for technical advice and UK wide supply.




