Pentair CCP420sq ft Filter Question

[Shawdaddy1972]

I am about to pull the trigger on a 33'x54" AG pool. I want to go with a cartridge filter. Will the pentair 420 sq ft filter system do the job? Can I go smaller? Thanks for any help. Below is a link to the filter.

http://www.pentairpool.com/pool-pro/...filters-27.htm

[PoolDoc]

Let's work this out the right way.

33' x 54" pool => actual water volume = 15.5^2 * pi * 4 * 7.48 = 22,600 gallons (at the 48" water line)
6 hour turn over rate = 22,600 / 6 / 60 = 63 gpm; 8 hour turn over rate = 22,600 / 8 / 60 = 47 gpm;

Target flow => 60 GPM on HIGH

Commercial cartridge filter rates = 0.375 gpm / sft ; Required sft for pool => 60/0.375 = 160 sft


So the 175 sft Hayward would be fine:
http://www.a1poolparts.com/-strse-25...dge/Detail.bok

as would the 200 sft Pentair
http://www.a1poolparts.com/-strse-14...ear/Detail.bok

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