Professional CET Design & Installation Solutions
Cairn Cross delivers specialist CET design, build and installation services for rail depots and maintenance hubs across the UK. Our approach combines innovative system design, robust civil infrastructure and integrated depot services to provide efficient waste handling and effluent disposal tailored to operational needs.
What are Controlled Emission Toilet (CET) Systems?
Controlled Emission Toilet (CET) systems are specialised rail depot facilities that allow the safe extraction and management of train toilet effluent, waste and retention tank contents when rolling stock returns to a depot. Instead of allowing waste to discharge onto the track, CET systems capture and transfer effluent into sealed holding tanks or sewer systems, ensuring hygiene, environmental protection and regulatory compliance.
CET infrastructure is now a standard requirement for UK rail operations, as modern rolling stock is equipped with toilet retention tanks that must be emptied in a controlled, safe and environmentally responsible way at the end of service.
CET Services Offered
Cairn Cross provides a full range of CET services, including:
- CET system design and planning – tailored to rail depot operations
- Civil works and base construction – foundations, access routes, drainage and containment
- Installation of CET modules and pumps – fixed or modular systems
- Integration with depot utilities – water, power and wastewater connections
These services ensure complete CET solutions that are safe, compliant and fully integrated with depot infrastructure.
