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  1. What Micron Prefilter

    Maintenance
    I'm installing a prefilter tucked up in the frame and I have a choice of 2, 10, or 30 micron filter. I've ruled out the 30 and don't know if 2 would be too tight and plug up quickly, altho these filters are cheaper than the main filter. What micron is the main filter. Enlighten me !!
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