Unicel C-5625 Replacement Spa / Pool Filter Cartridge – 25 Sq Ft (5″ OD x 13-5/16″ Length, Open 2-3/8″ Ends)
The Unicel C-5625 is a high-quality 25 sq ft pleated replacement filter cartridge commonly used in select Jacuzzi and similar pool/spa filtration canisters. With open ends and a compact 5″ diameter body, it’s designed to restore proper flow and filtration when your existing cartridge is worn, torn, or no longer cleans up well.
Key Features
- 25 sq ft filtration area for effective debris capture and steady circulation
- Open top & open bottom design for compatible standpipe/canister setups
- Durable pleated media and rigid core built for repeated cleaning cycles
- Ideal replacement when pleats are torn, frayed, or the cartridge stays restrictive after cleaning
Specifications
- Part Number: C-5625
- Filter Type: Pleated cartridge
- Filtration Area: 25 sq ft
- Length: 13-5/16″ (13.3125″)
- Outside Diameter: 5″
- Top End Cap: Open
- Top Inside Diameter: 2-3/8″ (2.375″)
- Bottom End Cap: Open
- Bottom Inside Diameter: 2-3/8″ (2.375″)
- Pleat Count: 103
Replaces / Cross References
- Pleatco: PJ25-IN-4 (also commonly listed: PJ25-IN-M4)
- Filbur: FC-1425
- Jacuzzi / Jacuzzi Brothers: CFR-25, CFT-25 (common cartridge references vary by system)
- Other common cross references: Aladdin 12507, Darlly 50251, Excel XLS-504, Spa-Daddy SD-00121, Tier1 PAS-1299
When to Replace
- Pleats are torn, frayed, or separating from end caps
- Water stays cloudy or circulation is weak even after proper cleaning
- Cartridge won’t clean up well after a deep soak and thorough rinse
- End caps are cracked/warped or the inner core is collapsing
Related Products
- Unicel C-5625 (Shop / Options)
- Pleatco PJ25-IN-4 (Alternate)
- Filbur FC-1425 (Alternate)
- Spa Cartridge Filter Cleaner
- Cartridge Cleaning Wands
- Spa Water Test Strips
Maintenance Tips
- Rinse the cartridge regularly (weekly for heavy use) to prevent restriction and keep flow strong.
- Deep clean every 3–6 weeks with a cartridge cleaner to remove oils; rinse thoroughly before reinstalling.
- If scale is present, degrease first, then use a scale remover (never reverse the order), and rinse completely.
- Rotating between two cartridges (one in use, one drying after cleaning) can extend overall filter life.
