Saratoga Spas Spa and Hot Tub Filter Cartridges made by Pleatco with Free Flow Technology that provides better performance that PVC core filters Pleatco Filters to Replace Unicel Part Numbers: 4CH-920, C-4303, 4CH-24, 4CH-940, C4303 Genuine Pleatco Part Numbers: PSG13.5, PSG25P4, PSG27.5, PSG27.5M, PSG40-P4, PSG40N, PSG-13.5, PSG-25P4, PSG-27.5, PSG-40M (MICROBAN) Saratoga Spas Spa and Hot Tub Filter Cartridge 303575 UNICEL 4CH-19 PLEATCO PSG13.5 FILBUR FC-0122 - $8.28 Each When You Buy 12 Filters $10.99, 6/$54.86, 12/$99.31 VITA Spa and Hot Tub Filter Cartridge 20241-238 UNICEL 4CH-20 PLEATCO PSG25-P4 FILBUR FC-0185 - $13.78 Each When You Buy 12 Filters $18.99, 6/$91.63, 12/$165.37 Saratoga Spas Spa and Hot Tub Filter Cartridge PLEATCO PSG27.5 FILBUR FC-0194 - $15.66 Each When You Buy 12 Filters $19.99, 6/$102.66, 12/$187.97 Saratoga Spas Spa and Hot Tub Filter Cartridge PLEATCO PSG27.5-M MICROBAN FILBUR FC-0194 - $17.40 Each When You Buy 12 Filters $22.99, 6/$114.28, 12/$208.85 SARATOGA Spa and Hot Tub Filter Cartridge PLEATCO PSG40-P4 FILBUR FC-0131 - $15.66 Each When You Buy 12 Filters $19.99, 6/$102.66, 12/$187.97 Saratoga Spas Spa and Hot Tub Filter Cartridge UNICEL 4CH-940 PLEATCO PSG40N-M MICROBAN FILBUR FC-0177 - $24.78 Each When You Buy 12 Filters $33.99, 6/$163.08, 12/$297.31 Search Here: E-mail Us Privacy Policy Shipping Rates View Cart