Before placing an order, please measure your filter at the return water and compare its size with that of this filter. Applicable models: Replace Pleatco PWW50-P3, PWW50P3, Unicel 6CH-940, Filbur FC-0359, Waterway Plastics 817-0050-01, FIL1400, 25252378, 902. Durable construction: The entire filter uses a strong ABS plastic core and unbreakable grip design. The thick polyester filter cloth forms a sturdy and durable body with excellent resistance to corrosion and high temperatures. Foldable design: Increased pleat count enhances dirt-holding capacity and improves filtration efficiency. The inner support structure features a three-layer laminated polyethylene net, covered with a weather-resistant and waterproof outer layer. This design helps maintain pleat integrity, prevents collapsing, and ensures even pleat distribution. Long service life: The unique filter cloth structure helps capture and retain debris effectively, allowing for easy cleaning and extended use. The filter is designed for long-term performance with regular maintenance. Features: Advanced filtration technology; high fiber content allows for increased dirt retention. Free-flow core design promotes better water flow and extends filter life. Reduced cleaning frequency and longer service life. Filter specifications: Material: Polyester fiber. Outer diameter: 150 mm. Thread size: 46.5 mm. Height: 243 mm. Maximum water temperature: 40°C (104°F). Maximum operating pressure: 35 psi. Recommended replacement cycle: Every 4 to 6 months. Compatible with: Spa filters including Unicel 6CH-940, Pleatco PWW50P3, PWW50-P3, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, and FIL1400. Note: These filters are not compatible with the new Canadian spa (Chinese spa) model, only with the original Canadian Spa.