Digging Deeper: What Was Hiding Beneath the Liner
Overview
A fire system contractor contacted The Tank Inspectors after routine wet fire testing identified an active leak in a water storage tank. With no inspection history on file and significant water loss already observed, the client wanted a liner replacement done quickly. Before proceeding, The Tank Inspectors recommended a full internal inspection- a step that would prove critical. What we found beneath the surface told a very different story to what a simple liner swap would have fixed.
Key Findings
- Extensive root intrusion had penetrated through the tank base.
- Corroded Anti-vortex
- Damaged Liner
- Ladder is heavily corroded
- Corroded Outlet Fittings
How The Tank Inspectors Help Protect Properties
- Support End Users
Comprehensive inspections protect the asset long before a failure occurs. By identifying deterioration early, building owners can make informed maintenance decisions, avoid costly unplanned repairs and extend the life of their tank infrastructure- shifting fire safety from a reactive expense to a managed, predictable cost.
Key Lessons
- Liner failure is often a symptom, not the root cause- inspection reveals what a visual assessment misses.
Recommendations
- Implement annual inspections and maintenance schedules consistent with AS1851.
- Keep comprehensive records of inspections, testing, and corrective actions.
Conclusion
This case shows the importance of inspecting the tank before major works begin. What first appeared to be a simple liner replacement revealed significant root intrusion and structural corrosion that would not have been found otherwise. Completing the inspection first allowed the underlying issues to be repaired at the same time, helping prevent future failures, repeat repairs, and additional costs.