SML Below Ground Cast Iron Drain Pipe x 3mtr
The Harmer SML Below Ground Cast Iron Drain Pipe forms part of a socketless soil and waste system linking building drainage to underground drains and sewers. Supplied in a standard 3mtr length, this Iron Pipe is made from grey cast iron and protected by internal and external coatings for below-ground use. Sections connect with compatible ductile iron couplings.
Specifications
| Product type | Cast iron drainage pipe |
| System | Harmer SML Below Ground |
| Material | Grey cast iron to DIN 1691 |
| Length | 3 metres |
| Internal coating | Epoxy, minimum 120μm |
| External coating | Zinc with brown RAL 8011 finish |
| Joint type | Socketless |
| Compatible couplings | Ductile iron or stainless steel |
| Standard | BS EN 877 |
| Certification | CE marked and Kitemark certified |
| Fire performance | Non-combustible |
These materials, coatings and certifications are confirmed by the manufacturer.
Key Design Features
The socketless design allows straight pipe sections and fittings to be joined with compatible couplings. An epoxy lining protects the internal waterway, while the external zinc and brown coating system is intended for buried installations. Rigid cast iron construction provides high load-bearing strength and resists deformation.
Features
- Range: SML Below Ground Cast Iron Drain Pipe System
- Material: cast iron
- Length: 3 metres
- Diameter Options: 50mm–400mm
- External Coating: Red primer (min. 40 µm)
- Internal Coating: Epoxy (min. 120 µm)
- Connections: Socketless twin-screw couplings
- Performance: High tensile strength and chemical resistance
- Certifications: CE Marked, BBA Certified, and Kitemark to BS EN 877
Applications
The SML Below Ground Cast Iron Pipe is ideal for underground drainage, soil stacks, and sewer connections. This range of cast Iron pipework is compatible with roof outlets, rainwater systems, and other fittings for complete, high-performance systems.
Explore More
Explore the full range of Harmer SML pipes and fittings from Castings Drainage for reliable, compatible drainage solutions.
Contact Us
For technical support or delivery details, contact Castings Drainage for expert advice and UK-wide service.




