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This is why I recommend 4" thick filters when possible

Posted by countryboymo (My Page) on
Thu, Aug 23, 12 at 21:38

I took my last 20x25x4" filter apart and measured the filter media length. 12 feet long! I think the last 1" filter I cut apart had 3-5 feet of filter material which is a huge difference.

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RE: This is why I recommend 4

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