Pool Filter Source
Cartridge catalogULTRA-A4-PAK4

Replacement cartridge

ULTRA-A4-PAK4

Pleatco Ultra

A source-reviewed replacement used with 3 compatible filters. Confirm the equipment model and physical details before ordering.

Application
Pool filters
Compatible filters
3
Specifications
Dimensions reviewed
Last reviewed
July 26, 2026

Cartridge measurements

Size & end caps

How to measure
Outside diameter
7 in
Cap-to-cap length
14 1/8 in
Top
Open3 in opening
Bottom
Open3 in opening

Compatibility

Compatible pool and spa filters

Check the complete equipment label before choosing a cartridge.
Pool filterPentair Clean & Clear Plus CCP 2404 cartridges neededPool filterSta-Rite (Pentair) PRC 504 cartridges neededPool filterPentair / American Products Quantum 2404 cartridges needed

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