Filter performance checks are recommended every how many days?

• A. Every 7 days
• B. Every 30 days
• C. Every 60 days
• D. Every 90 days

Answer: (B)

Regular monitoring of filter performance is crucial to catch early signs of clogging, contamination, or improper filtration so fuel can keep flowing smoothly and protect pumps and engines. Checking every 30 days provides a practical balance: it’s frequent enough to detect rising differential pressure across the filter or water buildup before problems develop, yet not so often that routine maintenance becomes excessive.

If checks were done more often, it would add unnecessary workload when the system is operating normally. If done much less often, particulates or water could accumulate to the point of restricting flow or causing damage, increasing the risk of fuel contamination reaching critical components. During a check, you’d verify the differential pressure across the filter, inspect for water in the separator or filter bowl, replace or service the filter as required, and record the results for accountability.