Technician A says to avoid over servicing filters, but measure filter restriction to obtain the best indication of when a filter requires replacement. Technician B says that to measure a filter restriction, use a vacuum gauge connected with a T-fitting or service port between the transfer pump and secondary filter. Who is right?

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The Answer of Technician A says to avoid over servicing filters, but measure filter restriction to obtain the best indication of when a filter requires replacement. Technician B says that to measure a filter restriction, use a vacuum gauge connected with a T-fitting or service port between the transfer pump and secondary filter. Who is right?

Technician a Says to Avoid Over Servicing Filters, but Measure