How often should the expansion joints in a water tank be inspected for leaks and cracks?

• A. Quarterly
• B. Semi annually
• C. Annually
• D. Every 2 years

Answer: (C)

Expansion joints move with the tank and handle temperature and volume changes, so they’re exposed to wear, seal degradation, and potential cracks over time. Regular checks are essential to spot leaks or damage before they lead to water loss or structural problems. Inspecting expansion joints on a yearly basis provides a practical balance between catching problems early and managing maintenance effort, taking into account typical seasonal cycling and aging of seals. If a system undergoes heavy thermal cycling, has a history of leaks, or operates under high pressures, more frequent inspections (such as quarterly or semi-annual) may be justified, but the standard interval is once per year. During the inspection, look for moisture around the joint, cracks or tears in the flexible material, degraded seals, misalignment, or movement at anchors, and plan timely resealing or replacement if issues are found.