Pentek ECP20-20BB

http://www.waterfilters.net/Pentek-ECP20-20BB-Water-Filters.html
The Pentek ECP20-20BB is a 20 micron Pleated Cellulose Polyester Water Filter Cartridges formulated using a resin-impregnated cellulose impregnated with polyester fibers. The Pentek ECP20-20BB water filters provide higher wet strength than regular cellulose cartridges and offer high flow rates and dirtholding capacity, while maintaining extremely low pressure drop. The ECP20-20BB replacement filter cartridge has minimal unloading and media migration and is pleated around a polypropylene core for added strength. The ends are immersed in a thermo-setting vinyl plastisol embedding and sealing each end of the pleat block forming a unitized end cap and gasket. The ECP water filter cartridges contain more media surface area than most competitive cartridges. The 20" Big Blue ECP cartridges contain 36 square feet of media. The Pentek ECP20-20BB replacement filter cartridge is recommended for chlorinated water supplies. It is not recommended for non-chlorinated water supplies because cellulose may start to break down if there is bacteria present.