Sort of the bible for CFS500 is CWO4Gunner's review and modification thread
. I read a bit of it and toward the end there's a suggestion to put the filter on a timer for a periodic shutdown to allow air that accumulates from cavitation to escape. See page 25, post #248. Maybe that's got something to do with your issue?
Could be! Thanks! I read through some of it but got out off by the bickering in the thread. I'll read through it again to see what else I missed. Otherwise, it's doing a great job for me.
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