POOLPURE spa filter cartridge C-8326 replacement for Sundance 6540-488 19in, 50-micron trilobal fabric

The POOLPURE C-8326 spa filter is a direct-fit replacement cartridge engineered to restore clear, low-maintenance water for spas that accept the Sundance 6540-488 style element.

If your spa or hot tub is running cloudy, trapping hair, sand, or fine debris can be the quickest way to regain consistent water clarity. The POOLPURE C-8326 (also referenced as PLFC-8326/Unicel C-8326/Filbur FC-2780 equivalents) is built with a multilayer trilobal filtration fabric and heavy-duty components to lift out fine particles while resisting wear from frequent rinsing and use. This page explains what the cartridge does, exact dimensions, cleaning advantages, and whether it fits your equipment.

Will this cartridge fit my Sundance or Unicel spa model?

Yes — the C-8326 is made to match the common geometry and port sizes of the Sundance 6540-488 and several cross-reference numbers. Confirming fit by comparing dimensions is recommended before purchase.

• Overall length: 19 inches
• Outside diameter: 8.5 inches
• Top connection: 2 3/16" slip
• Bottom: 2 1/2" beveled edge
• Compatible references: 6540-488, PLFC-8326, Unicel C-8326, Filbur FC-2780, 22507

How does the trilobal fabric and 50-micron layer improve filtration?

The filter combines a trilobal fiber weave with an upgraded 50-micron fine filtration layer to trap more contaminants than a single-layer cartridge. This structure increases the available surface area for capturing dirt and helps maintain flow rate so the pump doesn’t have to work harder as the cartridge collects debris.

• Trilobal fibers provide roughly three times the adsorption surface compared with standard fibers
• 50-micron layer catches very fine particles like hair, dust, and sand
• Maintains clearer water between cleanings to reduce chemical adjustments

What maintenance and cleaning benefits can I expect?

The C-8326 uses a dirt-locking design that holds solids until a quick rinse dislodges them, making routine maintenance simple and effective. Because the cartridge is built with robust fabric and reinforced end caps, it withstands repeated rinsing cycles without premature breakdown, extending usable life and lowering replacement frequency.

• Patented dirt-locking texture releases trapped debris easily during rinsing
• 4 oz. thickened polyester fabric resists wear for longer cartridge life
• Reinforced ABS end caps and strengthened core reduce failures

Is the POOLPURE cartridge tested and safe for long-term use?

POOLPURE products are engineered to meet industry standards and have been evaluated for material safety to ensure they won’t introduce harmful substances into pool or spa water. The brand partners with aquatic teams and has recognition from media and athletes to validate performance in demanding settings.

• IAPMO-tested against NSF/ANSI 50 material safety criteria
• Industry membership with the Pool & Hot Tub Alliance (PHTA)
• Real-world validation through athletic partnerships and media testing

Who is this for? The POOLPURE C-8326 spa filter is aimed at spa and hot tub owners who need a reliable, high-capacity replacement for Sundance 6540-488 style cartridges. It’s a practical choice for homeowners who want fewer maintenance cycles, operators of private training pools who demand consistent clarity, and anyone seeking an affordable aftermarket option engineered to match OEM fit and performance. Before ordering, check your existing cartridge’s length, diameter, and top/bottom port sizes to ensure compatibility.