A manometer with a scale of 0 to 5 inches reads 1 inch; should the aeration blower inlet filter be replaced?

A manometer with a scale of 0 to 5 inches reads 1 inch; should the aeration blower inlet filter be replaced?

• A. Replace now
• B. Do not replace the filter
• C. Replace only if reading exceeds 3 inches
• D. Replace at scheduled maintenance

Answer: (B)

Interpreting the manometer reading shows whether the blower inlet filter is clogged. A reading of 1 inch on a 0-to-5-inch scale indicates only a small pressure drop across the filter, meaning the air path isn’t significantly restricted. That level is well below common replacement thresholds (often around 3 inches or per the manufacturer’s spec), so the filter is still clean enough to operate without replacement. Replace the filter only if the differential pressure rises toward the higher end of the scale or as part of scheduled maintenance if your program calls for it; at this moment, there’s no need to replace.

Interpreting the manometer reading shows whether the blower inlet filter is clogged. A reading of 1 inch on a 0-to-5-inch scale indicates only a small pressure drop across the filter, meaning the air path isn’t significantly restricted. That level is well below common replacement thresholds (often around 3 inches or per the manufacturer’s spec), so the filter is still clean enough to operate without replacement. Replace the filter only if the differential pressure rises toward the higher end of the scale or as part of scheduled maintenance if your program calls for it; at this moment, there’s no need to replace.