Tier1 Jacuzzi J300 J400 Replacement Spa Filter 4-Pack — 15.5×6.75in Trilobal High-Flow

When your spa’s filter is clogged or worn, water clarity, heater efficiency, and pump performance fall off quickly. These Tier1 cartridges are built to match common Jacuzzi and aftermarket filter references so you can swap them in without modifying the housing. Each cartridge combines a high-flow internal core with trilobal filter media to trap finer debris while maintaining consistent circulation.

Will these Tier1 cartridges physically fit my J300 or J400 spa?

The Tier1 cartridges measure 15-1/2" long by 6-3/4" wide and are engineered to match the dimensions of popular replacement references used in J300 and J400 systems. They are made to align with original filter housing and seals to prevent leaks or poor seating.

• Exact dimensions: 15-1/2" x 6-3/4" for reliable seat and sealing.
• Cross-compatible with Pleatco PJW60TL-OT-F2S and PJW60TL models.
• Also fits Filbur FC-2715, Unicel 6CH-961 and SD-00641 references.

How does the filter media improve water clarity compared to standard cartridges?

These cartridges use trilobal fibers that present a greater surface area versus conventional round fibers, which captures more fine particles and organic matter. The result is clearer water and fewer contaminants making their way back into the spa between cleanings.

• Trilobal dirt-lock media traps up to 40% more debris than round fibers.
• Captures hair, skin oils, leaves, and fine particulates effectively.
• Maintains flow to reduce strain on pumps and heaters.

Are these cartridges durable and safe for regular spa use?

Tier1 filters are independently tested for performance and longevity under NSF protocols, which evaluates filtration effectiveness and material durability. They’re designed to tolerate normal chemical exposure typical in spa maintenance when used and cleaned according to manufacturer guidance.

• Independently tested to NSF 50 standards for durability and performance.
• Robust construction reduces tearing and collapse during use.
• Washable cartridge body extends service life between replacements.

How will these filters affect pump and heater performance?

The cartridge includes an engineered high-flow core to preserve steady water circulation. That helps the pump operate without added strain and avoids common issues like reduced heater flow or pressure drops that can occur with restrictive filters.

• Internal high-flow core maintains consistent circulation and pressure.
• Reduces risk of pump overwork compared with clogged/old media.
• Designed to allow adequate heater flow for efficient temperature control.

Who is this for: This 4-pack is aimed at spa owners and service professionals who need a cost-effective, reliable replacement for Jacuzzi J300 and J400 filtration cartridges or equivalent aftermarket models. Choose this set if you want a direct-fit spare, improved fine-particle capture, NSF-tested performance, and a high-flow design to protect pumps and heaters during regular spa use.