Pentair 50 SqFt Clean & Clear Center Core

The Pentair 50 SqFt Clean & Clear Center Core (part number 59053500) is a critical internal structural backbone and water-routing column engineered exclusively for single-element vertical cartridge filtration systems. This genuine original equipment manufacturer (OEM) part is designed specifically to maintain the structural stability of the Pentair Clean & Clear 50 (CC50) and American Products Predator 50 single-cartridge filters, serving both pre-2009 and modern configurations.

Primary Operational Role & Mechanics

The center core plays a dual role inside the pressurized filter housing: it acts as an unwavering vertical alignment column and the primary internal fluid collection hub. In standard operation, a coreless 50-square-foot polyester fabric filter cartridge (part number R173213) is slid over this center core. The core features a specialized twist-lock bottom coupling that inserts into the drain and outflow port at the very base of the filter tank; to lock it securely into position, it must be rotated clockwise until it clicks into place.

During the pool filtration cycle, raw, pressurized water enters the outer tank chamber and is forced inward through the cartridge pleats. The center core is heavily perforated with a calculated grid pattern of flow windows that support the fabric element against collapsing inward under immense hydraulic pressure. Once the water passes through the fabric and enters these windows, the hollow center column consolidates the high-velocity fluid stream and channels it straight down through the bottom plumbing outlet back to the pool return loops. Additionally, the sealed top section of the core features a rectangular upper extension designed to seat flush within a corresponding stabilizing recess in the filter lid, acting as an internal brace.

Service Guidance & Material Properties

Pro Service Tip: When performing routine element maintenance, the center core is designed to remain locked inside the filter tank. If it pulls out stuck inside the cartridge, it indicates the bottom bayonet fitting was not properly rotated into its locked tracking seat. Separate the cartridge from the core gently; cleaning the fabric element without the core inside allows trapped debris and organic oils to rinse off much more freely.

Injection-molded from a heavy-walled, high-impact engineered polymer composite, the core is optimized to handle a standard system flow rate of 50 GPM and safely withstand system operating parameters up to 50 PSI without warping or fracturing under sudden pump startup surges. Because it is permanently submerged within a highly dynamic, chemical-rich utility vessel, its resilient plastic formulation completely resists structural flattening, material brittleness, and advanced chemical oxidation or bleaching from constant exposure to high-strength sanitizers like liquid chlorine, bromine, algaecides, and acidic scale-removing flushes. Due to its rigid, open-grid cylindrical framework, this replacement center core carries a net product and shipping weight of approximately 1.00 to 4.05 pounds, depending on the localized protective packaging structure.