POOLPURE Spa Filter Cartridge 6CH-940 Replacement 1-1/2" Coarse Thread 2-Pack — 50 Sq Ft, 50-Micron Filtration

POOLPURE 6CH-940 is a two-pack replacement spa cartridge with a 1-1/2" coarse thread, designed to restore filtration performance in compatible hot tubs and spas.

If your spa’s cartridge is clogged, torn, or past its service life, swapping in a correctly sized replacement restores water clarity and reduces strain on the pump. These POOLPURE cartridges match the common 6CH-940 form factor and use a trilobal polyester media plus a fine 50-micron layer to trap sediment, hair, and other debris while remaining easy to rinse and reuse.

How do I know this filter will fit my spa?

Measure your existing cartridge before ordering. The POOLPURE 6CH-940 copies the standard 6CH-940 dimensions and thread type used by many manufacturers, but thread size and type are critical—this unit uses a 1-1/2" coarse (SAE) bottom thread and will not fit 2" or fine-thread fittings.

• Length: 7 5/8" (overall)
• Outer diameter: 6"
• Top: circular grip handle for easy removal
• Bottom: 1-1/2" SAE coarse thread — confirm your spa’s adapter

What filtration performance should I expect?

POOLPURE cartridges combine a trilobal fiber structure with a 50-micron fine filtration layer to capture a wide range of particles without overly restricting flow. The fabric design increases surface area, improving dirt-holding capacity and promoting sustained clarity under normal use.

• Filtration area: 50 sq. ft for extended service intervals
• 50-micron fine layer captures hair, dust, pollen, and sand
• Trilobal fibers increase dirt adhesion while remaining rinseable
• Patented dirt-locking structure releases debris easily during rinsing

How durable and safe are these replacement cartridges?

These cartridges use a thicker polyester fabric, reinforced ABS end caps, and a strengthened core to withstand repeated rinsing and handling. POOLPURE products are tested for material safety and meet recognized standards to ensure they don’t leach harmful substances into your water.

• 4 oz. thickened polyester filter fabric for improved lifespan
• Reinforced ABS end caps and integrated core for structural strength
• NSF/ANSI 50 tested materials for long-term water exposure safety
• Reusable design reduces replacement frequency and cost

How do I maintain and clean the cartridge?

Rinse the cartridge regularly with a hose to remove trapped debris; the dirt-locking structure is engineered to release particles when sprayed. For deeper cleaning, soak according to your spa manufacturer's guidelines, then rinse thoroughly before reinstalling.

• Hose-rinse weekly or more often with heavy use
• Use manufacturer-approved soak cleaner for periodic deep cleaning
• Inspect for tears or crushed pleats—replace if damaged
• Rotating two cartridges between cleanings extends life and performance

Who is this replacement cartridge best for? If you own a spa or hot tub that requires the 6CH-940 form factor and a 1-1/2" coarse-thread cartridge, this POOLPURE two-pack is a practical, cost-effective option. It's aimed at homeowners and property managers who want reliable filtration, longer-lasting media, and easier maintenance without buying OEM parts. Before purchasing, verify thread size, thread type, and overall cartridge dimensions to ensure a proper fit. POOLPURE stands as an independent compatible brand and provides performance-focused alternatives to original equipment cartridges.