6CH-352 Spa Filter Cartridge 2 Pack - Replacement 2 in MPT Hot Tub

In this review the 6CH-352 spa filter cartridge 2 pack is evaluated for homeowners and service techs who need a direct replacement for common 2 in MPT threaded hot tub filters. The bottom line: this cartridge is best for owners who want a like-for-like, easy-to-clean replacement compatible with PAS40-F2M, Unicel 6CH-352, Filbur FC-0312 and similar models, because it matches the 8 in length, 6 in diameter and 2 in male thread while offering a high filtration area for clearer water.

Key Features

• Compatibility: Fits a wide range of spa models including PAS40-F2M, Unicel 6CH-352 and Filbur FC-0312 so swapping is straightforward for many hot tubs.
• Exact dimensions: The 8 in length and 6 in outside diameter with 2 in MPT bottom thread ensure proper seating in systems built for this cartridge size.
• Top handle design: The semi-circular closed handle stays attached for easier removal and replacement without twisting or tools.
• Large filtration area: With about 35 sq. ft. of media the cartridge captures more particles between cleanings, improving water clarity.
• Improved media: The trilobal fabric structure cleans more readily, reducing time spent rinsing and helping extend usable life.
• Pack of two: Two cartridges in the set give a spare on hand or permit swapping for routine maintenance cycles.

Who It's For

The 6CH-352 cartridge is aimed at spa and hot tub owners who need an off-brand replacement that mirrors original filter dimensions and handle style; service professionals who maintain multiple tubs with common filter types will also appreciate the compatibility notes. Owners who prefer to stick with factory brand filters for warranty or brand loyalty should look elsewhere, since this is an independent-brand alternative used for fit and function rather than original equipment branding.

It also suits buyers who want an easy-to-clean cartridge with a larger filtration area to reduce debris between routine rinses; if a tub uses a different thread size, length or a removable top handle, double-check measurements before purchasing.

Pros & Cons

Pros

• Direct compatibility with multiple common replacement numbers, making installation straightforward for most affected spas.
• Generous 35 sq. ft. filtration area helps keep water clearer between cleanings.
• Semi-circular closed handle and trilobal fabric make cleaning and handling easier during maintenance.

Cons

• Not an original equipment brand, so buyers wanting OEM labeling should choose a manufacturer-branded cartridge.
• The closed handle is noted as not removable, which could limit certain maintenance approaches that rely on handle removal.

Specifications

Length	8 in
Outside Diameter	6 in
Bottom Thread	2 in MPT (male)
Top	Semi-circular closed handle
Filtration Area	35 sq. ft.
Pack Quantity	2 cartridges

Our Verdict

The 6CH-352 spa filter cartridge 2 pack is a practical, cost-effective replacement for owners who need correct dimensions and broad compatibility; it offers a large filtration area and easier cleaning thanks to the trilobal media. Choose this set if you want reliable fit, simpler maintenance and a spare cartridge, but opt for OEM parts if you require original-brand labeling or removable-handle designs.

Frequently Asked Questions

Will this filter fit my spa model?
Check that your existing cartridge measures approximately 8 in long with a 6 in diameter and uses a 2 in male thread; the listing matches PAS40-F2M, Unicel 6CH-352 and similar numbers for compatibility.

How often should the filter be cleaned?
For best performance the improved trilobal fabric should be rinsed every two weeks under typical use to maintain flow and clarity.

How long does the cartridge last?
Under normal wear the filter life typically exceeds one year, though water chemistry and use patterns will affect actual longevity.