Mamokin Hot Tub Cartridge Filter 303279 2-Pack — Fits Filbur FC-2402, 9-3/8" x 5-3/16", Trilobal Fabric

Mamokin 303279 is a two-pack replacement hot tub cartridge filter engineered to fit Filbur FC-2402 and equivalent spa filter models, delivering improved debris capture and easier cleaning for clearer spa water.

When your spa needs reliable filtration without the premium price, the Mamokin 303279 cartridge offers a direct-fit replacement for many popular filter part numbers and brands. Each cartridge measures 9-3/8" in length with a 5-3/16" outside diameter, a closed top with a string handle, and a 1-1/2" MPT threaded bottom. These filters use a trilobal fabric structure engineered to trap fine particles while allowing straightforward rinsing and maintenance.

How does this filter fit my existing hot tub?

The Mamokin 303279 is designed to be compatible with Filbur FC-2402, 5CH-37, PFF42TC-P4, 78460 and many OEM spa brands such as Lifesmart, AquaTerra, Fantasy, Freeflow, Simplicity, Bermuda, Aspire, and Azure. Before you buy, confirm your current cartridge's dimensions and thread type to ensure a correct fit.

• Length: 9-3/8" — matches the common replacement size.
• Outside diameter: 5-3/16" — fits housings built for these cartridges.
• Top: closed with string handle — easy removal and replacement.
• Bottom: 1-1/2" MPT threaded — standard hot tub connection.

What cleaning and maintenance does it require?

Mamokin filters are designed with an improved trilobal fabric that simplifies rinsing and helps release trapped debris during a clean. Routine maintenance keeps the filter performing well: rinse every two weeks and deep-clean periodically to remove oils and scale that reduce flow.

• Rinse with a hose every 1–2 weeks for normal use.
• Soak in a filter-cleaning solution monthly or as needed.
• Inspect for tears or permanent discoloration; replace if damaged.
• Typical service life often exceeds one year under normal wear.

What performance can I expect compared to OEM filters?

This Mamokin replacement is built to offer comparable filtration performance to the listed OEM cartridges while balancing longevity and cost. The multilayer trilobal fabric captures fine particles and helps protect pumps and plumbing from debris, contributing to clearer water between maintenance cycles.

• Trilobal fabric structure improves particle capture efficiency.
• Design extends service life to keep pollutants away from spa water.
• Two-pack gives you an on-hand spare for routine swaps.
• Independent brand offering compatibility across multiple spa makers.

How do I choose the right replacement and avoid mistakes?

Selecting the correct cartridge depends on matching measurements, thread type, and top/bottom configuration from your existing filter. Many return issues arise from ordering the wrong size—measure your old filter and cross-check part numbers before purchase.

• Compare exact length and diameter to your current cartridge.
• Confirm the bottom thread is 1-1/2" MPT for compatibility.
• Check that the top is closed with the same handle style for easy removal.
• Use the listed compatible part numbers as a cross-reference guide.

Who is this for? The Mamokin 303279 two-pack suits hot tub owners who need an affordable, easy-to-clean replacement for common Filbur and OEM cartridges. It's ideal for homeowners maintaining mid-range to older spas that use the specified dimensions and thread style, and for anyone who prefers having a backup filter ready for routine maintenance. Note: Mamokin is an independent brand; listed trademarks belong to their respective owners and are shown only for compatibility reference.