Hot Tub Forum
Original => Hot Tub Forum => Topic started by: Spiderman on November 04, 2006, 04:25:07 pm
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What exactly does filter square footage mean? No, this is not a trick question ::)
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Spiderman
It means that if you were to unfolt the pleats out flat and measure the square area of the surface
ie. 12 inches by 50 feet equals 50 sq ft