Find your parts diagram
Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
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Unicel Pentair Rainbow Dynamic 35 | C-4335
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CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
The Unicel C-4335 Cartridge is a 35 square foot replacement filter designed for Pentair Rainbow Dynamic IV and similar inline cartridge systems. Built with 219 pleats of strong polyester fabric, it traps fine particles and oils to maintain clean pool and spa water. Its 9-1/4″ length, 4-15/16″ outer diameter, and 2-1/8″ center openings replicate OEM sizing for a dependable fit. Compatible with multiple part numbers across brands, the C-4335 helps extend cleaning cycles and reduce chemical usage for efficient system performance.
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Direct Replacement Cartridge: Equivalent to Pentair Rainbow 17-2482, R173431, Waterway 817-3501, Pleatco PRB35-IN, and Filbur FC-2385.
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35 Sq. Ft. Media Area: Offers 219 pleats of polyester fabric to capture dirt and fine particles effectively between routine cleanings.
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OEM-Grade Fit: Sized at 9-1/4″ × 4-15/16″ with 2-1/8″ openings, ensuring accurate installation in compatible filter housings.
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Built for Longevity: Rugged polyester and molded end caps provide resistance to pool chemicals and UV exposure for extended use.
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Improves Clarity & Balance: Boosts circulation and water quality while lowering chemical demand in spas or small pools.