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Pool filters

Hayward Star-Clear Plus C-1200PA120 Hayward Star-Clear Plus C-900PA90 Hayward Star-Clear Plus C-1750 / C-1900PA175 Hayward Star-Clear C-500PA50 Hayward Star-Clear C-250PA25 Hayward Star-Clear II C-800PA80 Hayward SwimClear C-4025PA106 Hayward Super Star-Clear C-4500 / SwimClear C-4520PA112 Hayward Super Star-Clear C-5500 / SwimClear C-5520PA137 All filters

Spa filters

Rainbow Dynamic 50 (spa)PRB50-IN Rainbow Dynamic 35 (spa)PRB35-IN Rainbow Dynamic 25 (spa)PRB25-IN Waterway Front Access Skimmer (spa)PWW50 Leisure Bay & Dynasty SpasPLBS50 Leisure Bay S2/G2 Spa 75PLBS75

Guides

How to clean a filter cartridgeWhen to replace a cartridgeSand vs cartridge vs DEFilter sizes & measuringHot tub filter replacementAll guides

Size calculator Reminders Find my filter

Find my filterHayward Star-Clear Plus C-1200 Hayward Star-Clear Plus C-900 Hayward Star-Clear Plus C-1750 / C-1900 See all: Pool filters Rainbow Dynamic 50 (spa)Rainbow Dynamic 35 (spa)Rainbow Dynamic 25 (spa)See all: Spa filters How to clean a filter cartridge When to replace a cartridge Sand vs cartridge vs DE See all: Guides Size calculator Reminders

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Free tools

Cross-reference finder and filter size calculator.

Filter finderSearch any part number or model Filter size calculatorHow big a filter your pool needs

Find the right replacement pool or spa filter cartridge fast: cross-reference by model or part number, then compare prices.

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Popular filters

Hayward Star-Clear Plus C-1200
Hayward Star-Clear Plus C-900
Hayward Star-Clear Plus C-1750 / C-1900
Hayward Star-Clear C-500
Pentair Clean & Clear Plus 420
Rainbow Dynamic 50 (spa)
All filters

Tools & guides

Filter finder
Filter size calculator
How to clean a cartridge
Sand vs cartridge vs DE

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© 2026 Pool Filters Now. Cross-references come from manufacturer catalogs and retailer listings. Always compare length, diameter and openings with your old cartridge before ordering. Brand names are used only to identify compatible parts.