This is why I recommend 4" thick filters when possible

countryboymoAugust 23, 2012

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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countryboymo

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    Bookmark   August 23, 2012 at 9:40PM
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