OC-513G Spa Filter Cartridge – Premium Replacement Filter (25 Sq. Ft.)
Keep your spa water crystal clear with the OC-513G replacement filter cartridge, designed for reliable performance and broad compatibility across popular spa systems. Built with high-quality filtration media and precision sizing, this cartridge effectively captures dirt, debris, and fine particles—helping maintain cleaner, healthier water with less effort.
With a 25 sq. ft. filtration area and durable 3 oz. media, the OC-513G delivers consistent flow and long-lasting performance. Its universal 2-1/8" top and bottom openings ensure an easy fit for a wide range of spa models, making it a dependable choice for both residential and commercial applications.
Key Features:
- Proudly Made in the USA: Crafted with American quality and precision
- Strong Core Construction: Injection-molded cores made from 100% virgin ABS or PP
- Rugged Point-Bonded Design: Engineered for even debris loading and improved filtration efficiency
- Break-Resistant Bands: Strategically placed to support media and maintain consistent pleat spacing
- Symmetric Core Openings: Promotes even water flow and balanced filter loading
- Robust End Caps: Built with chlorine- and mildew-resistant urethane for long-term durability
- Flawless Fit: Precision-engineered to meet spa and pool specifications
- Quick Identification: Unique OnCore part number for easy product reference
Compatibility:
Designed to fit multiple spa systems including:
- Dynamic Series I (RDC-25, RDC-25S)
- Dynamic Series II & II RTL/RCF-25
- Dynamic Series IV (DFM, DFML)
- Waterway 25 In-Line
- Custom Molded Products systems
Replaces / Cross Reference:
- Pleatco: PRB25-IN
- Unicel: C-4326
- Filbur: FC-2375
Specifications:
- Part Number: OC-513G
- Reference: WSOC.RBW513G-6P
- Application: Spa
- Diameter: 5" (127 mm)
- Length: 13-5/16" (338 mm)
- Top/Bottom Hole: 2-1/8" (54 mm)
- Media Weight: 102 g/m² (3 oz/yd²)
- Filtration Area: 25 sq. ft. (2.32 m²)
- Case Quantity: 6
- UPC (Each): 849373016061
Why Choose OC-513G?
Engineered for dependable filtration, durability, and precise fit, the OC-513G is a high-quality replacement solution that helps extend spa life while keeping water clean, clear, and inviting.