Grefilt 2-Pack Hot Tub Filter – Compatible with Watkins 303279, FC-2402, PFF42TC-P4 | 42 sq.ft. Each, 1 1/2" MPT

Refresh your spa experience with the Grefilt 2-Pack Hot Tub Filter, designed as a practical, compatible replacement for a range of popular models. Each filter delivers reliable filtration through reinforced materials and a durable build, helping you maintain clear water and steady flow without hassle. This 2-pack setup means ready replacements when you need them, so you can focus on your soak rather than maintenance.

With a robust 42 square feet of filtration area per filter and a compact 9 3/8" length, these units fit snugly in many spa setups, including Watkins 303279 and FC-2402, Lifesmart, Freeflow, Hydromaster, Grandmaster, Simplicity, Bermuda, and other compatible models. The bottom is threaded 1 1/2" MPT to accommodate a wide range of housings, while a closed top with a string tie keeps the core protected from debris during operation. The result could be steady water circulation and easier cleaning cycles when paired with regular spa maintenance.

Designed for dependable spa filtration

The filters use NSF-certified materials and a reinforced polyester core to help resist the wear of outdoor spa environments. End caps are engineered to withstand corrosion, contributing to long-term performance. While no guarantee is implied, the design aligns with common spa maintenance routines and replacement schedules, offering a practical option for ongoing use.

• NSF-certified materials for safer spa water
• Corrosion-resistant end caps and reinforced core for durability
• Easy, tool-free installation and routine cleaning every two weeks

What you get and how it helps

• Two filters per pack: each with 9 3/8" length, 5 1/4" outside diameter, and 1 1/2" MPT bottom
• Filtration area of 2 × 42 sq ft per filter for robust water treatment
• Compatibility with Watkins 303279, FC-2402, PFF42TC-P4 and other common spa models

Maintenance at a glance

• Simple install with no special tools required
• Rinse every 2 weeks for optimal performance
• Designed to withstand outdoor spa conditions for lasting use

Note: This is a compatible spare part; brand names and part numbers are used for reference purposes only. Grefilt is an independent brand offering a compatible option for a range of spa systems.