Pool Replacement Filter PA175 C1750 Compatible Cartridge - NSF

Our review of the TOREAD Pool Replacement Filter for PA175 and C1750 finds it best suited for pool owners who need a reliable, high-capacity cartridge replacement that matches common Hayward and Unicel models. The single biggest reason to buy is its certified construction: NSF/ANSI 50 certification and trilobal filtration fabric deliver clear water while using materials tested for pool and spa safety. Installers and DIY maintainers will appreciate a near-exact fit and a filtration area that reduces cleaning frequency compared with older point-bond cartridges.

Key Features

• NSF/ANSI 50 certification: Provides reassurance that the filter uses materials tested for pool and spa safety so families get cleaner water.
• Trilobal filtration fabric: The trilobal fiber shape increases particle capture efficiency without a large pressure drop, reducing filter cleaning frequency.
• Large filtration area: With 175 sq. ft. of media, the cartridge handles more flow and debris than many smaller replacements, extending run time between cleanings.
• Reinforced construction: Thicker filtration fabric, heavy chlorine resistant end caps, and a strengthened center support help the cartridge resist breakage during normal use.
• Exact fit dimensions: The cartridge measures 28 3/16 in length and 8 15/16 in OD with 4 in top and bottom openings to match PA175 and C1750 style housings for straightforward replacement.
• Broad compatibility: Designed to replace several common models, making it a convenient spare part for owners of Hayward, Unicel, Filbur and similar systems.

Who It's For

This cartridge is aimed at residential pool and spa owners who currently use PA175 or C1750 style filters and want a replacement with certified materials and higher filtration area. It is also a good option for pool service professionals who need a sturdy, chlorine-resistant cartridge that fits a range of common replacement part numbers.

Customers who need an exact OEM-branded part for warranty reasons or who require a longer-term proven lifespan beyond typical cartridge durability testing should check manufacturer guidance or consider OEM options; some users reported variable longevity across heavy-use installations.

Pros & Cons

Pros

• Certified to NSF/ANSI 50, offering tested material safety for pool and spa use.
• Trilobal fabric and 175 sq. ft. media improve capture efficiency and reduce cleaning frequency.
• Reinforced end caps and center support increase resistance to breakage during handling.
• Compatible dimensions make it a straightforward swap for PA175, C1750 and similar models.

Cons

• Durability reports are mixed; some users note shorter life under heavy use compared with expectations.
• As an independent brand replacement, it is not an OEM part and may not satisfy warranty requirements tied to original manufacturer parts.

Specifications

Length	28 3/16 in
Outside Diameter	8 15/16 in
Top & Bottom Opening	4 in
Filtration Area	175 sq. ft.
Filter Material	Trilobal filtration fabric
Certification	NSF/ANSI 50
Compatible Models	PA175, Hayward C1750 series, Unicel C-8417, Filbur FC-1294

Our Verdict

The TOREAD PA175/C1750 replacement cartridge is a practical, cost-conscious option for anyone replacing a worn cartridge with emphasis on certified materials and higher filtration area. It offers good value for routine residential pools and spa systems where compatibility and filtration performance matter, though buyers seeking OEM-backed longevity or warranty alignment should verify requirements before purchase.

Frequently Asked Questions

Will this cartridge fit my Hayward Star Clear Plus C1750?
Yes, the dimensions and listed compatibility include Hayward Star Clear Plus C1750 and similar C1750-series housings for a direct replacement.

How often will I need to clean this filter?
With 175 sq. ft. of trilobal media it typically requires less frequent cleaning than smaller cartridges, but actual frequency depends on pool usage, debris load, and water chemistry.

Is this an OEM part?
No, this is an independent brand replacement that uses manufacturers' model numbers for reference; TOREAD is a separate brand and not the original equipment manufacturer.