The Unicel C-7415 is a 65 square foot replacement filter cartridge built for high-volume pool filtration systems requiring a large-format open-end design. Engineered with 163 pleats of heavy-duty 4 oz. Reemay 2040 spun-bond polyester media — a step above the standard 3 oz. Reemay 2033 — this cartridge delivers superior dirt-holding capacity, extended service intervals, and consistent water clarity in demanding applications. Specifications Filter Area 65 sq. ft. Length 14 13/16" Outer Diameter 7 1/2" Top Inner Diameter 2 15/16" Bottom Inner Diameter 2 15/16" Material 4 oz. Reemay 2040 Pleat Count 163 Top Cap: Open Bottom Cap: Open Fits Into OEM Brand Product Name Part Number Notes Sonfarrel — 2310650 — Rec Warehouse — 111794 — Martec — 244-065 — (This is not an exhaustive list.) Pro Tip: Before ordering, confirm your current cartridge measures 14 13/16" in length, 7 1/2" outer diameter, and 2 15/16" inner diameter at both ends. The open/open end cap configuration means this cartridge relies on your filter housing's internal standpipe or manifold to seat correctly — verify your housing supports this design. Also known as: C7415
