Pleatco Advanced Ultra-S18 Bandless Cartridge

The Pleatco S-18 Ultra Cartridge Filter (65 sq. ft.) is primarily used in Cal Spas, Leisure Bay, Waterway Plastics, Maax Spas, Emerald and Clearwater Spas. It is often a replacement for top-load skim filters (S2/G2) in these brands. It also fits models by California Cooperage, Rec Warehouse and Rainbow Plastics. 

Key Compatibility Details:

• Filter Cartridge Area: 65 sq. ft.
  
• Filter Cartridge Actual Diameter: 5 ⁵⁄₁₆"
• Product Height: 14 ¹³⁄₁₆"
• Filter Holes (Top and Bottom): 2 ⅛"
  
• Interchangeable Part Numbers: Pleatco PLBS75, Unicel C-5374, Filbur FC-2971 and Rainbow R173600
  
• Primary Brands: Cal Spas (LP 75 sq. ft.), Leisure Bay/Rec Warehouse, Waterway Plastics
• Other Compatible Brands: Maax Spas, California Cooperage, Clearwater Spas