Saving a Global Manufacturing Facility from Regulatory Shutdown

The Challenge

During a routine engineering review, Arnan identified a dead leg in the facility's Water for Injection (WFI) distribution system. A dead leg — a section of piping where water stagnates rather than flowing — creates conditions for microbial growth that directly threatens product sterility. In this case, the dead leg was in a critical section of the loop that served multiple aseptic filling suites. Left unresolved, this issue would have been identified during a regulatory inspection, potentially resulting in facility shutdown, product recalls, and significant financial and reputational damage.

The Approach

Arnan conducted a comprehensive assessment of the entire WFI distribution network, mapping all use points, flow velocities, and potential stagnation zones. The analysis revealed not only the primary dead leg but several additional design weaknesses that would have become compliance issues over time.

A complete loop redesign was engineered that eliminated all dead legs while maintaining continuous supply to all production areas. The redesign was planned and executed in phases to avoid any production downtime — a critical requirement given the facility's global supply commitments.

The Outcome

• Dead legs eliminated across the entire WFI distribution system
• Zero production downtime during the remediation
• Full regulatory compliance restored and documented
• Subsequent regulatory inspection passed without findings on the water system
• Facility avoided potential shutdown worth millions in lost production