How often should the water level indicators in tanks be tested for accuracy?

• A. Every 2 years
• B. Every 3 years
• C. Every 5 years
• D. Every 7 years

Answer: (C)

Regular accuracy checks of water level indicators are essential to ensure the tank readings match the actual water level, so operations don’t risk overfill or insufficient supply. The five-year interval is chosen because these indicators tend to remain stable over time, with only gradual drift or wear occurring. This cadence balances the need to verify accuracy with the effort and cost of testing, catching any significant deviation before it becomes critical while not requiring excessive maintenance. During the test, you compare the indicator’s reading against a known reference level, confirm the mechanism moves freely, and inspect for signs of wear or misalignment, recalibrating if needed. Shorter intervals would add unnecessary work and cost, while longer ones could allow undetected inaccuracy to go too long.