Description
Square Inspection Chambers & Rectangular Inspection Chambers
The Harmer SML Below Ground Cast Iron Inspection Chamber provides a durable and accessible point for maintenance, cleaning and inspection within below-ground drainage networks. Precision-manufactured from EN-GJL-150 grey cast iron to EN 1561, these square inspection chambers are finished with a red two-part epoxy coating (minimum 60 µm) internally and externally to provide excellent resistance against corrosion and abrasion. Designed to integrate seamlessly with the Harmer SML socketless system, the cast iron inspection chamber ensures long-term structural integrity and reliability in commercial, residential and civil engineering applications.
Benefits
- Strong EN-GJL-150 cast iron body for reliable below-ground performance.
- Two-part red epoxy coating ensures lasting corrosion protection.
- Provides easy access for inspection, testing and cleaning of drainage runs.
- Fully compatible with Harmer SML socketless fittings and couplings.
- Compliant with BS EN 877 and ISO 6594 standards for quality and performance.
Features
- Material: Grey cast iron EN-GJL-150 to EN 1561.
- Coating: Red two-part epoxy, 60 µm minimum internal/external thickness.
- Configuration: Square or rectangular chamber options available.
- Standards: BS EN 877, ISO 6594, BBA certified, CE Marked, Kitemark approved.
- Fire classification: A1 non-combustible to EN 13501-1.
Applications
Used as an access point within underground soil and waste systems, the cast iron inspection chamber provides a safe, sealed and durable solution for routine maintenance. Suitable for both square inspection chambers and rectangular inspection chambers in heavy-duty and high-load environments.
Explore more
Browse the full range of SML cast iron pipes and below-ground drainage components available from Castings Drainage.
Contact us
For technical specifications, installation guidance or delivery details about the SML Cast Iron Inspection Chamber, contact Castings Drainage, providing expert advice and UK-wide supply.





