Pleatco Pool & Spa Filter Cartridge PA137-PAK4 Replacement for Unicel C-7490-4 — 7" x 32.75", Advanced Point-Bond Media

This genuine Pleatco cartridge uses Advanced Point Bonded media and a Free Flow Core to trap fine particles, extend cleaning intervals, and reduce pump strain. Built to OEM tolerances for a dependable fit and tested at Pleatco’s U.S. engineering center, the PA137-PAK4 replaces Unicel C-7490-4 and compatible models such as CX1380-RE and select Hayward Super-Star-Clear and SwimClear cartridges. It combines a reinforced core, Super-Bond pleat bands and durable end caps to deliver consistent filtration in residential and light-commercial pools.

How does this cartridge capture smaller debris without frequent cleaning?

Pleatco Advanced Point Bonded media features a higher fiber count and a point-bond construction that creates a dense filtration surface without restricting water flow. That means the cartridge can trap finer particles while resisting rapid clogging, so you spend less time cleaning and more time swimming.

• High-fiber, point-bonded fabric captures finer particulates
• 4 oz. media weight with 548 sq ft of surface area for extended dirt capacity
• Super-Bond bands keep pleats separated for even loading

Will this filter keep circulation efficient and lower pump stress?

The Pleatco Free Flow Core is an injection-molded box-ladder design that maximizes throughput and maintains structural integrity under pressure. By encouraging even flow and reducing resistance, the core helps keep operating pressures lower, which can reduce pump wear over time.

• Free Flow Core increases water throughput and stability
• Reinforced center supports prevent core collapse under load
• Design promotes even dirt loading for consistent performance

Does this cartridge fit my existing filter housing?

The PA137-PAK4 is engineered to meet exacting OEM dimensions so it installs as a like-for-like replacement in systems that accept Unicel C-7490-4 and equivalent cross-reference numbers. Verify your housing accepts a 7" diameter by 32.75" length cartridge with 3" top and bottom center holes prior to purchase.

• Outer diameter: 7" (177.8 mm)
• Length: 32.75" (831.85 mm)
• Top/bottom center hole: 3" (76.2 mm)

How is Pleatco quality and traceability different?

Pleatco designs and tests cartridges at its U.S. facility and provides a SmartTrack code on each filter for lifetime identification, quality tracking and warranty support. Construction features—like break-resistant end caps and Superbond pleat bands—focus on longer service life and simpler maintenance compared with many alternatives.

• Made and engineered in the U.S. with OEM tolerances
• Pleatco SmartTrack code for product identification and tracking
• Durable end caps and reinforced pleat bands for extended life

Who is this for: Pool and spa owners, service technicians, and facility managers who need a reliable, OEM-compatible replacement cartridge that improves filtration efficiency and lowers maintenance frequency. Choose the Pleatco PA137-PAK4 when you want higher dirt capture, steady flow, and a trusted, traceable cartridge that fits systems using Unicel C-7490-4 or equivalent cross-references.