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AK-3047 for Unicel C-4625

25 sq ft. Replacement Filter Cartridge for Alps Spas, Replacement of Unicel C-4625, Pleatco PRB25-IN-4

Replacement Filter Cartridge
25 sq ft.
4 15/16"
13 5/16"
4 15/16"
In Stock
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  • Bottom Cap:

    Open Hole: 2 1/8"

  • Top Cap:

    Open Hole: 2 1/8"


We ship most orders complete within 24hrs.

Product Highlights

This 25 sq. ft., 4 15/16" OD Pool or Spa Filter has a 2 1/8" Open Hole Top, a 2 1/8" Open Hole Bottom, and is 13 5/16" long. It is crafted of the highest quality materials; and engineered to be superior. With USA MADE REEMAY®, the highest quality fabric that removes unwanted bacteria and contaminants, keeping your water crystal clean.
Our Pool and Spa Replacement Filter Cartridges meet or exceed OEM specifications. They install easily, and begin working to clean water immediately. Once you have tried our filters, you will see how they filter out more debris than the other brands, and out last other brands.

  • Guaranteed Perfect Fit
  • Filters Bacteria & Contaminants
  • Eco Friendly Filter Cartridge
  • Extremely Durable - Wash & Reuse
  • Withstands High Pressures & Temperatures
  • Energy Efficient
  • Easy Installation

Hint: keep an extra filter on hand so that when its time to clean your filter, you will be able to replace it immediately with the back-up.This will allow you the time to leisurely deep clean your dirty filter and allow it to dry completely before replacing it; and without any down time on your pool or spa system.

The Unicel C4625 - 25 sq ft. Replacement Filter Cartridge for Alps Spas for the Filbur-FC-2370, Pleatco-PRB25-IN-4 and OEM-17-2325 pool and spa water filter cartridges.

Interchangeable Part Numbers





We have listed all known part numbers associated with this product. Some part numbers may not be listed for old/discontinued items. Every filter on this site is different. If you aren’t sure if this is your filter, call 661-833-9600. We’re happy to help.

Supported Brands

Alps Spas, Aries Spas, Associated Leisure Products, Blue Pacific Spas, Esther Williams, Haughs, Heldor Spas, Hydro Pool Industries, J.E.M. Spas, Niagra Whirlpool, Pentair Pool Products, Pentair Pool Products - Rainbow Plastics Replacements, Sequoia Design, Serenity Spas, Warm Springs Spas, Waterway Plastics

Some brands may not be listed. If you aren’t sure if this is your filter, call 661-833-9600. We’re happy to help.

Pleated Filter Cartridges from

Our Universal Pleated Filter Cartridges are washable, reusable, and durable. As a result, our filters last longer than other brands, and are more economical too. Our filters work hard for you by holding more dirt than other brands; and increased dirt holding capacity means cleaning your pool or spa less often.

Our universal pleated filter cartridges are constructed of the highest quality non-woven polyester, with a durable polypropylene core to provide maximum strength. The ends are immersed in thermo setting vinyl plastisol that seals the end of each pleat uniting the components and forming a permanent bonded end cap, unlike cheap alternatives. This makes our universal pleated filter cartridges perfect for residential, commercial, and industrial pool and spa applications.

Relish our comprehensive pool and spa collection that includes world-class filters and state-of-the-art pool, spa, and pond accessories at exclusive discount club prices. Please let us know if we don't have what you need, we CAN find it.

Wrong product, go to our Filter Finder to find your pool & spa filter cartridge. Or…We’re here to help. Call 661-833-9600 M-F 5:30 am to 4 pm PST. Is it after hours, email, and we’ll get back to you ASAP.

Customer Reviews

  1. Satisfied with Unicel-c-5374 ,5/2/15
    By Joseph

    Finally, I got Unicel-c-5374 replacement cartridge here, I found it so many online websites but the product is whether sold out or not matching my requirement, but after visiting here I found relevant filter cartridge that I was fed up for replacing.

  2. Unicel C-4625 is my preferred choice ,5/2/15
    By David Miller

    Unicel C-4625 is the compatible filter cartridge and replacement of my OEM # 17-2325 product. Thanks for providing the high quality product on best price.

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