Unicel C-7471 Replacement Filter Cartridge for 105 Square Foot Clean and Clear Plus, Waterway Crystal Water
105 Square Foot Clean & Clear Plus, Waterway Crystal Water. Replacement for: Pentair Pool Prod R173576 (Note: Four 105 Square Foot cartridges required. Model dated after 11/98.); Pentair Pool Prod - Pac Fab Replacements 178584 (Note: Four 105 Square Foot cartridges required. Model dated after 11/98.); Waterway Plastics 817-0106 (Note: Four 105 Square Foot cartridges required. )