Arpisziv PDM28 Spa Filter Replacement 2-Pack — 7¼" x 5½" Cartridge, Low Pressure Drop

Arpisziv PDM28 spa filter 2-pack is a direct replacement cartridge designed to restore clear, debris-free water in hot tubs and small pools compatible with part numbers 461273, FC-9944 and SD-01392.

These two replacement cartridges are made to fit a range of popular spa and hot tub models. With a compact 7 1/4" height and a 3" top and bottom opening, the filters trap hair, leaves, sand, and other suspended particles so your circulation system can run more efficiently. They balance low pressure drop with good flow to help protect pumps and extend system life when used correctly and cleaned regularly.

How will these filters improve my spa’s water clarity?

The Arpisziv PDM28 uses layered filtration media that captures visible debris and fine particulates, reducing cloudiness and buildup in the plumbing. Cleaner water reduces the workload on chemical sanitizers and keeps surfaces clearer between deep cleans.

• Dual-pack for quick swapouts and continuous coverage.
• Multi-layer media traps hair, sand, moss, leaves and dust.
• Low pressure drop maintains steady flow to the pump.
• Dimensions match common replacement part numbers for easy compatibility.

Will these cartridges fit my existing spa or hot tub?

These cartridges measure 7 1/4" tall with a 3" top and bottom opening and a 5-1/2" diameter, matching the footprint of PDM28-style filters. They are listed as replacements for part numbers PDM28, 461273, Filbur FC-9944 and Spa Dad SD-01392, so they’re a drop-in option for compatible systems.

• Height: 7 1/4"; diameter: 5-1/2"; openings: 3" top and bottom.
• Replaces PDM28, 461273, FC-9944, SD-01392 for many models.
• Sold as a 2-pack so you can keep a spare on hand.
• Measure your old cartridge to confirm fit before purchase.

How do I clean and maintain these replacement filters?

Maintenance is straightforward: rinse loose debris with a high-pressure water gun, then soak periodically in a filter-cleaning solution if heavily soiled. Regular cleaning preserves flow and extends the cartridge lifespan compared with neglect.

• Rinse with a water gun to remove trapped debris quickly.
• Soak in a manufacturer-recommended filter cleaner for deep cleaning.
• Inspect seals and pleats for damage; replace when worn.
• Keep a rotation schedule—one cartridge in use, one spare—for uninterrupted operation.

What performance benefits should I expect after swapping to these filters?

After installing fresh Arpisziv cartridges, you should notice clearer water, fewer clogs in the skimmer and circulation lines, and steadier pump performance due to reduced backpressure. That translates into lower maintenance time and more reliable equipment operation.

• Improved debris capture lowers visible particulates.
• Reduced strain on pump and plumbing from better flow.
• Simpler routine cleaning and longer intervals between replacements.
• Two cartridges included for immediate replacement and backup.

Who is this for: Owners of small to medium hot tubs, swim spas and above-ground pools that use PDM28-style cartridges and compatible part numbers. This two-pack suits homeowners who want an affordable, easy-to-install replacement that improves filtration efficiency and helps maintain clear water with minimal fuss. Always confirm dimensions and part compatibility before ordering to ensure a proper fit.