Spa Filter Cartridges

Maintain clean, clear spa water with replacement spa filter cartridges from Filbur, Unicel, Pleatco, and Jacuzzi. PST Pool Supplies stocks spa filter cartridges from 5 to 155 square feet of filtration area — covering the full range of portable hot tubs and in-ground spas — starting from $12.70.

Spa filter cartridges trap oils, lotions, hair, and particulate matter that enter the water with every use. Unlike pool filters that run continuously, spa filters handle a relatively high bather load in a small water volume — making regular cartridge maintenance and timely replacement essential for water clarity and bather health. The key products in this collection: Filbur cartridges use Reemay™ spunbound polyester media with Microban® antimicrobial protection impregnated into the fibers — Microban inhibits bacterial growth within the filter media itself, extending the effective life of the cartridge between cleanings. Filbur cartridges range from 65 sq ft (suitable for small portable spas) to 155 sq ft (for larger spas with high bather loads). The Filbur Micro-Klean Pre-Filter is a disposable inline pre-filter that attaches via a hose adapter to the garden hose used to fill the spa — it removes metals, minerals, and sediment from the fill water before it enters the spa, dramatically reducing the initial chemical demand and preventing mineral staining. The Unicel 5 sq ft cartridge (no core) is a compact filter element used in certain small portable spa circulation systems and some waterfall/feature filters. Pleatco cartridges provide OEM-equivalent replacements for Pleatco-compatible filter housings. The Jacuzzi Rainbow faucet cartridge assembly is a replacement cartridge unit for the Jacuzzi Rainbow fill faucet — a faucet-mounted filter used to condition fill water as it enters the spa.

Spa filter cartridges should be rinsed every 2–4 weeks with a garden hose (spray between the pleats, not across them — spraying across tears the media), chemically cleaned every 60–90 days using a cartridge filter cleaner soak to remove oils and scale that rinsing alone cannot remove, and replaced annually or when the pleated media shows fraying, tears, or flattening. Running a spa with a degraded filter is the primary cause of cloudy water, foam, and premature equipment wear. When ordering a replacement cartridge, match the existing cartridge's outer diameter, inner diameter, length, and top/bottom end cap thread configuration — cartridge dimensions are not standardized across manufacturers.

Shop spa filter cartridges at PST Pool Supplies and keep your hot tub water sparkling clean between water changes.