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Old 09-09-2013, 11:09 PM
hookedon210s hookedon210s is offline
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Join Date: Jan 2004
Location: Jacksonville, FL
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The reason the fleece (polyester) filter is specified for extended drain intervals is due to a whole host of reasons but primarily due to longevity---up to 15 times longer for fleece vs. cellulose according to Mann/Hummel at this link.

https://www.mann-hummel.com/company/upload/doc/HBAAEJwjOMP.pdf

Based on the info here I would use fleece where available even if the drain intervals are not extended. Mark
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