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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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C-9431 | Unicel Cartridge For AquaStar PLF35000 Filter | PF35000
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CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
On the AquaStar Pipeline PLF35000 Cartridge Filter diagram
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The Unicel C-9431 is a high-capacity cartridge filter element designed for the AquaStar Pipeline PLF35000filter system serving as a direct replacement for the PF35000 cartridge. It offers approximately 250 sq ft of premium pleated filtration media and is built to OEM specifications to restore optimal flow, clarity and operational efficiency for large residential or commercial pools. Compatible as a direct replacement for AquaStar part numbers PF35000 / PLF35000. The heavy-duty design and Reemay® spun-bond media enable longer cleaning cycles and improved filtration performance compared to worn cartridges. Ideal for pool professionals and serious homeowners looking to maintain peak filtration in high-flow, high-capacity systems.
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OEM-Compatible Replacement: Built to match AquaStar PF35000 / PLF35000 filter systems and Unicel’s original C-9431 model number for a precise fit and performance.
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Large Filter Area (~250 sq ft): Provides extensive filtration surface to capture fine debris and extend cleaning intervals in large pools or heavy-use installations.
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Durable Media Construction: Uses high-quality Reemay® spun-bond polyester pleats engineered for long life, easier cleaning and reliable performance under pool conditions.
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Enhances Water Clarity & Flow: By replacing a worn cartridge with the C-9431, users restore proper flow rates and filtration efficiency—helping maintain crystal-clear water.
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Professional Grade Service Solution: Designed for large or commercial-scale pools but entirely serviceable by experienced homeowners seeking top-tier filtration reliability.
- (1) Unicel C-9431 Cartridge
- AquaStar PLF35000 Pipeline Filters