PA106-PAK4 Pool Filter Replacement Cartridges - 4 Pack

In this review of the PA106-PAK4 pool filter replacement cartridges, the bottom line is simple: these four cartridges are a cost-effective option for pool owners who need a high filtration area and a close fit to common Hayward-compatible models. The reviewer found the cartridges offer a clear benefit in filtration efficiency thanks to their trilobal fiber material, and they match the listed dimensions for a reliable fit. For those prioritizing initial value and fit, this is a practical choice; durability concerns reported by some users mean long-term buyers should weigh cost versus expected lifespan.

Key Features

• Compatibility: Designed to replace PA106-style cartridges and fit models listed such as C4030, C4025 and C4020, making replacements straightforward for many filter housings.
• Filtration area: A 106 sq. ft. filtration area provides substantial surface for trapping debris, helping maintain clearer pool water between cleanings.
• Premium material: Constructed from advanced trilobal fibers to increase dirt-holding capacity and improve filtration efficiency compared with standard point-bond fabric.
• Size and fit: Measured at 25-1/2 in length with a 7 in outer diameter and 3 in top/bottom openings to match the advertised legacy part dimensions.
• Easy to clean: Evenly unfolded pleats made from Reemay-like material are designed for straightforward rinsing and repeated use to control maintenance time and cost.
• Value pack: Sold as a 4-pack, providing multiple replacements at a lower per-cartridge cost for seasonal maintenance.

Who It's For

This cartridge set is best for pool owners with filter housings that accept PA106-style cartridges who want an affordable, high surface-area replacement. It suits buyers who prioritize fit and filtration area and who plan to perform routine rinsing to keep cartridges functioning between full cleanings.

It is less suitable for users seeking the longest-lasting OEM lifetime; several customers reported limited durability in heavy-use scenarios, so those seeking a premium, longest-life cartridge may want to consider higher-end branded alternatives or plan for more frequent replacements.

Pros & Cons

Pros

• Good compatibility with many C4030/C4025/C4020-style housings for an easy swap.
• High 106 sq. ft. filtration area helps capture more debris and extend time between deep cleanings.
• Trilobal fiber construction and even pleats improve dirt-holding capacity and cleaning ease.
• Four cartridges per pack lowers per-unit cost for seasonal maintenance.

Cons

• Some customers reported issues with durability, noting cartridges may not last as long under heavy load.
• Independent brand; manufacturer references are for fit only and name-brand longevity may differ.

Specifications

Our Verdict

The PA106-PAK4 4-pack is a sensible value pick for owners who need a correct-fit replacement with a large filtration area and easy cleaning. It performs well for capturing debris and fits common PA106-compatible housings, but buyers should be aware that durability can vary; it is best for those who prefer lower upfront cost and accept occasional replacement during the season.

Frequently Asked Questions

Will these fit my Hayward C4030 filter?
They are sold as compatible replacements for C4030-style cartridges and match the listed 25-1/2 in by 7 in dimensions, so they should fit housings accepting PA106-style cartridges.

How do I clean these cartridges?
Rinse with a high-pressure hose along the pleats and perform periodic deep cleaning per your filter manufacturer guidance; the pleat material is made for repeated washing.

How long will a cartridge last?
Longevity varies with pool conditions; the trilobal fiber design aims to double service life over basic fabrics, but some users report shorter lifespans under heavy debris loads.