Waterco 217270A Opal XL Cartridge Filter 50PSI - Opal XL Cartridge Filters are designed to house an extra-large filter cartridge, maximizing its dirt holding capacity and minimizing filter maintenance. The filter's dome lid allows easy access to the filter cartridge for removal, cleaning, and installation in a matter of minutes. The Opal XL Cartridge Filters are ideal for applications where backwashing may not be practical or areas where water may be scarce. Constructed from high impact polypropylene and designed for easy maintenance. The Opal XL Cartridge Filters will provide years of trouble-free service