Pentair Cartridge Gasket

The Pentair Cartridge Gasket (part number R172222 or R172222Z) is a specialized structural elastomer seal engineered exclusively for high-pressure sanitization and compact filtration vessel configurations across Pentair’s Rainbow™ and Dynamic® equipment lines. This original equipment manufacturer (OEM) replacement gasket is standard hardware designed for the internal sealing interfaces of the Dynamic Series Chlorine/Bromine Dispenser (Models R172540 and R172540F), the Top Load In-Line Cartridge Dynamic Series V Filter (Models DSC 75 and DSC 100), the Dynamic Series I Inline Cartridge Filter (Models RDC-25, RDC-25S, RDC-50, and RDC-50S), and the Dynamic Series II & III Filter networks (Models RTL and RCF).

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Molded from a heavy-duty, high-density, and chemically inert synthetic rubber or fluorocarbon polymer matrix, this gasket is designed to sit securely within the designated compression channel of the filter housing or chemical feeder lid. Its primary operational role is to establish an absolute watertight and airtight compression boundary when the locking ring, filter cap, or access assembly is manually threaded down. This prevents dynamic fluid leaks and stops concentrated chemical vapors from weeping into the surrounding equipment pad, ensuring the pressurized vessel can safely handle high-velocity circulation streams and sustain continuous system operating metrics up to 50 PSI without failing under sudden pump startup surges. Built to endure a highly aggressive water treatment environment, its robust elastomeric design completely resists material flattening, stretching, dry-rotting, and advanced chemical bleaching from constant, direct contact with slow-dissolving sanitizing agents like trichlor chlorine tablets, bromine, and routine maintenance acid washes. Due to its precise, small-format circular profile and high-density material core, this individual replacement cartridge gasket carries a nominal product and net shipping weight of approximately 0.01 to 0.05 pounds (about 0.16 to 0.80 ounces).