The Pentair Cartridge Element (R173216) is the OEM replacement 150 sq. ft. filter cartridge for Pentair Clean & Clear, Predator, Clean & Clear RP, Posi-Clear RP, and System:2 Modular Media cartridge filter systems. ⚠️ IMPORTANT: CONFIRM YOUR FILTER'S SQUARE FOOTAGE BEFORE ORDERING This cartridge is sized for 150 sq. ft. filter models only. Clean & Clear and Predator filters are available in multiple sizes — verify your filter's square footage rating on the filter label or in your equipment manual before ordering. ⚠️ IMPORTANT: CLEAN & CLEAR FILTER SYSTEMS — MODEL YEAR NOTE For Clean & Clear Filter Systems (model number CLEAN & CLEAR), this cartridge fits units manufactured 2009 and beyond. If your filter was manufactured before 2009, verify the part number against your equipment manual before ordering. The cartridge element is the primary filtration media in your Pentair cartridge filter. As pool water passes through the pleated polyester fabric, debris, fine particles, and contaminants are captured and held in the cartridge folds. When the filter pressure gauge reads 8–10 PSI above the clean starting pressure, the cartridge is due for cleaning or replacement. A degraded or clogged cartridge reduces flow through the system and compromises water clarity. Specifications Pentair Part Number R173216 Part Name Cartridge Element Filtration Area 150 sq. ft. Quantity Included Each (1 cartridge) Fits Into Brand Equipment Line Model / Part Number Notes Pentair Clean & Clear — Clean & Clear / Predator Series CLEAN & CLEAR 150 Cartridge element for 150 sq. ft. models Pentair Predator — Clean & Clear / Predator Series PREDATOR 150 Cartridge element for 150 sq. ft. models Pentair Clean & Clear RP Filters — Clean & Clear RP Series CLEAN & CLEAR RP 150 sq. ft. filter only Pentair Posi-Clear RP Filter 150 sq. ft. — PXC Series PXC150 Fits 150 sq. ft. filter only Pentair System:2 Modular Media Filter — PLM Series PLM150 Cartridge element for 150 sq. ft. filter only Pentair Clean & Clear Filter Systems — Clean & Clear Series CLEAN & CLEAR 150 sq. ft. models; manufactured 2009 and beyond Pentair Predator Filter — Clean & Clear / Predator Series PREDATOR For 150 sq. ft. models Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering. Pro Tip When inspecting a used cartridge for replacement, check the pleated fabric for tears, collapsed pleats, or a grey-brown discolouration that doesn't rinse clean — any of these indicate the cartridge has reached end of service life and should be replaced rather than cleaned. For filters running in high-bather-load or high-debris environments, keeping a second cartridge on hand lets you swap immediately and soak the dirty one in cartridge cleaner overnight, extending the usable life of both elements.
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