COMPATIBLE MODELS – Replacement for Hayward CCX1750-RE, Pleatco PXST175, Filbur FC-1287, Unicel C-8317, Waterway 817-0150N, Hayward X-stream 175, Hayward X-Stream CC1750, Clearwater II Pool Filter and Waterway Pro Clean, 817-0150P, SD-00391 filtration cartridges. DIMENSIONS FOR RELIABLE FIT – This 23-5/16" x 8-15/16" cartridge is engineered to fit seamlessly into compatible pool filtration systems, supporting consistent performance without leaks or gaps. TRILOBAL DIRT-LOCK MEDIA – Advanced trilobal fibers capture up to 40% more debris than standard round fibers, trapping dirt, hair, leaves, and fine particles while maintaining maximum water flow. TESTED TO NSF 50 STANDARDS – Independently tested to NSF protocols for performance and durability, supporting consistent water clarity and reliable filtration. ENGINEERED FOR CONSISTENT FLOW – Internal high-flow core delivers steady water circulation, protecting pump performance without restricting pressure or causing heater issues like some filters. Q: Will this filter fit my system? A: Yes, it’s designed as a direct replacement for CCX1750-RE, PXST175, FC-1287. Q: How does trilobal media improve filtration? A: Its unique fibers capture more fine debris than standard media, helping keep water visibly cleaner. Q: Can the filter be reused? A: Yes, the pleated design withstands multiple cleanings with a garden hose. Q: How long does it last? A: Each cartridge provides dependable filtration for up to 3 months under normal conditions. Q: Why replace even if it looks clean? A: Over time, microscopic oils and debris embed deep in the fibers, reducing efficiency and water flow.