Description
Unicel C-8474 Replacement Cartridge Filter – 75 Sq Ft (Open Top & Bottom, 3-3/4″ ID)
The Unicel C-8474 is a premium 75 sq ft pleated cartridge filter designed for select pool and spa filter canisters that use an open-top / open-bottom element with a 3-3/4″ inside diameter opening on both ends. Replacing your cartridge on schedule helps maintain strong circulation, steady water clarity, and reduces strain on the pump and heater.
Key Features
- 75 sq ft filtration area for effective debris capture and good flow
- Open top and open bottom end caps for compatible standpipe-style canisters
- Helps reduce cloudy water and short filter cycles caused by worn or clogged media
- Built for repeated cleaning cycles with durable pleated media and a rigid inner core
Specifications
- Part Number: C-8474
- Filter Type: Pleated cartridge
- Filtration Area: 75 sq ft
- Length: 15″
- Outside Diameter: 8-15/16″
- Top End Cap: Open
- Top Inside Diameter: 3-3/4″
- Bottom End Cap: Open
- Bottom Inside Diameter: 3-3/4″
- Pleat Count: 165
Replaces / Alternate Part Numbers
- Pleatco: PAST75
- Filbur: FC-0901
When to Replace
- Pressure rises quickly after cleaning or circulation stays weak
- Pleats are torn, frayed, or separating from the end caps
- End caps are cracked/warped or the core is collapsing
- Water stays dull/cloudy even with proper chemistry and routine rinsing
Cleaning & Care Tips
- Rinse the cartridge when pressure increases about 8–10 PSI above your clean starting pressure.
- Spray between pleats from top to bottom and rotate the cartridge as you clean.
- For oily buildup, soak in a cartridge cleaner, then rinse thoroughly before reinstalling.
- If scaling is present, use a scale remover only after oils are removed (cleaner first, then scale treatment if needed).
Related Products
- Unicel C-8474 (Shop / Variants)
- Pleatco PAST75 (Alternate Cartridge)
- Filbur FC-0901 (Alternate Cartridge)
- Cartridge Filter Cleaner
- Cartridge Cleaning Wands
- Filter Tank O-Rings & Gaskets
Maintenance Tips
- Keeping the cartridge clean protects equipment—restricted flow can overwork pumps and reduce heater performance.
- If you can, rotate between two cartridges to extend service life (one in use, one drying after cleaning).
- Balanced water chemistry helps prevent premature clogging, scaling, and shortened cartridge life.
