Compatibility - Pleatco PWW50L - Unicel 4CH-949 - Filbur FC-0172 - SD-01143 - 817-4050 Specifications - Outer diameter: 5 inches (125 mm) - Total length: 14.76 inches (375 mm) - Barrel length: 13.70 inches (348 mm) - Hole diameter: 1.89 inches (48 mm) - Filter area: 50 square feet Construction and design - ABS inner core for large flow - Widened band for a stronger, more durable body - Thick filter fabric - Increased cartridge folds to boost filter capacity Performance and benefits - Efficiently removes hair, leaves, dust, sediment, and sand - Delivers safe, clear purified water for spa and hot tub use - Maintains equipment efficiency and water quality with regular replacement Use scenarios - Scenario 1: Routine spa or hot tub filter replacement during regular maintenance - Fits standard filter housing for common spa systems, ensuring consistent filtration performance - Scenario 2: High-demand spa use in busy households - Durable construction and higher filter capacity support sustained filtration in daily use - Scenario 3: Debris-prone environments or seasonal cleanliness - Effective removal of hair, leaves, dust, and sand helps keep water clean after outdoor use or pollen-heavy periods This filter cartridge maintains compatibility with common models, delivers strong filtration performance, and supports reliable spa and hot tub water cleanliness.