WATERCO FULFLO TRI CARTRIDGE FILTERS 3.5 Bar pressure ratingFulflo Tri Cartridge Filters are designed to effectively filter out suspended solids from your pool. Fulflo Tri cartridge filter houses three individual pleated filter cartridges, maximising its dirt holding capacity and minimising filter maintenance, leading to significant water savings. Fulflo Tri Cartridge Filters are ideal for applications where backwashing may not be practical or areas where water may be scarce.