SpiroPure Spa Filter 4-Pack — Direct-Fit PSG27.5 Replacement with High-Capacity Pleated Media

SpiroPure Spa Filter 4-pack is a direct-fit replacement cartridge for PSG27.5, PSG27.5P4, PSG27.5-XP4, 4902-068 and Unicel C-4327 style hot tub filters.

If your spa needs consistent water clarity and a simple swap-in filter solution, this SpiroPure 4-pack matches the common PSG27.5 family of cartridges and equivalent OEM part numbers. Each cartridge is engineered with a high-capacity media, a reinforced inner core and keyed end fittings to make replacement quick and reliable. Below you'll find practical details on fit, performance, installation and maintenance so you can decide if these cartridges are right for your spa system.

Will this cartridge fit my spa model and OEM part number?

Yes — the SpiroPure cartridge is designed to be compatible with Pleatco PSG27.5, PSG27.5-XP4 and equivalent OEM parts. It matches common dimensions and keyed ends used by several manufacturers, so it replaces the listed reference numbers directly.

• Outer diameter: 4-3/4" and length: 11-3/8" for correct housing fit.
• Top style: closed handle for easy removal; bottom: 1.9" open keyed connection.
• Compatible with Pleatco PSG27.5 series, Saratoga 4902-068 and Unicel C-4327.

How does the SpiroPure filter perform compared with OEM cartridges?

The cartridge uses high-grade filter media and a robust inner core for steady filtration and improved dirt-holding capacity. It’s engineered to maintain water flow while capturing fine particles, providing performance on par with or better than many OEM replacements.

• High dirt-holding media extends time between cleanings.
• Strong inner core resists collapse without restricting flow.
• Pleated design increases surface area for efficient filtration.

How do I install and maintain these spa filters?

Installation is straightforward: remove the old cartridge, inspect the filter housing, and insert the new cartridge until the keyed bottom locks. Routine rinsing and periodic chemical soaking keep the media working longer and preserve circulation performance.

• Rinse with a garden hose after each heavy use to remove surface debris.
• Soak monthly in a filter cleaner solution for deep cleaning.
• Replace annually or sooner if media shows damage, heavy discoloration, or reduced flow.

What materials and build features improve durability?

These cartridges combine durable pleated media with a reinforced inner core and keyed end fittings that resist wear from repeated handling and water chemistry. The construction is intended to balance strength with unobstructed water passage for reliable, long-term use.

• Durable pleated filter media for extended service life.
• Reinforced inner core that prevents collapse under pressure.
• Precision-end fitments for leak-free seating and easy swaps.

Who is this for: spa and hot tub owners who need a dependable, drop-in replacement for Pleatco PSG27.5 family cartridges or equivalent OEM parts. Ideal for maintenance-minded users who prefer stocking a multi-pack for staggered replacements, service technicians who perform routine filter changes, and anyone looking to maintain clear water with an economical, high-capacity cartridge option.