Fast, removing particles as small as two microns the first time through. Its patented Flex-Tube design gives longer cycles between cleaning because the same D. Filter powder is used over and over. Pump-to-filter union connection provides simple installation and winterization.20-square-foot effective filtration area; injection-molded Dural on filter tank. Maximum pool size 19,000 gallons, based on 8-hour turnover rate. Arrival time will depend on your location. If you have any questions, feel free to ask. The item "Hayward EC40AC Perflex DE Filter With Valve" is in sale since Wednesday, October 29, 2014. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Filters".281" and is located in Saginaw, Michigan. This item can be shipped worldwide.