PELLUCID Spa Filter Cartridges 3-Pack — Fits Watkins 31489 / Pleatco PWK30, Trilobal Fiber & Carbon Backbone

PELLUCID replacement spa filter cartridges (3-pack) fit Watkins 31489 and Pleatco PWK30 and provide improved dirt capture and durable support for clearer spa water.

These non‑OEM PELLUCID spa filter cartridges are designed to match common dimensions used in many hot tubs and spas, offering a cost‑effective alternative to brand‑name filters. Built with trilobal fiber media, reinforced carbon fiber backbone, and chemically resistant end caps, the cartridges focus on reliable particle removal and long service life. The set includes three identical filters sized to interchange with Unicel C-6430 and several compatible models, making it easy to keep replacement filters on hand.

How do these filters improve water clarity?

The trilobal filter fabric traps fine particles more efficiently than standard pleated media, helping reduce visible debris and cloudiness. Better dirt-holding capacity means the filter runs longer between cleanings and keeps more contaminants out of circulating water.

• Trilobal fiber increases surface area for finer filtration.
• High dirt-holding capacity reduces frequency of full maintenance.
• Effective against pollen, hair, dust, sand, and larger debris.

Will these cartridges fit my spa model and how do I confirm compatibility?

Match the cartridge measurements to your existing filter: height 10 1/2", outer diameter 5 7/8", top and bottom openings 1 15/16". These filters are manufactured to be compatible with Unicel C-6430, Watkins 31489, Pleatco PWK30, Filbur FC-3915 and other listed cross‑references.

• Check height and diameter against your current cartridge.
• Confirm top/bottom opening dimensions for proper seat and seal.
• Consult your spa manual or existing filter part number for a cross reference.

How do I clean and maintain these PELLUCID filters?

Routine rinsing and occasional scrubbing extend filter performance. Use a cartridge cleaner tool and hose every two weeks under typical use, and perform a deep soak with a filter cleaning solution periodically for best results.

• Rinse off loose debris with a garden hose after each use or weekly.
• Scrub pleats gently with a cartridge brush or cleaner tool biweekly.
• Soak in a filter-cleaning solution every 1–3 months depending on usage and water chemistry.

How durable are these cartridges compared with OEM filters?

PELLUCID cartridges use a one-piece carbon fiber backbone and chemically resistant end caps for improved structural life, resisting cracking and collapse under normal spa circulation. While not original equipment, the materials and construction are selected to provide long service at a lower price point.

• Carbon fiber core resists bending and breakage under pressure.
• Chemically resistant end caps withstand sanitizers used in spas.
• Quality pleated media designed to balance flow and filtration life.

Who this is for: The PELLUCID 3-pack is aimed at spa and hot tub owners who need an affordable replacement that matches common OEM sizes and want improved dirt capture without paying OEM premiums. It's suitable for owners of Watkins, Pleatco, Filbur, and Unicel compatible models who perform regular filter maintenance and expect durable performance from aftermarket parts. If you require exact OEM branding, consult your dealer; if you want cost-effective, high‑performance filter cartridges that fit the listed measurements and cross‑reference numbers, this set is a practical choice.