Unicel Replacement Filter Cartridge for 125 sf Sundance | C-8325
Unicel
SKU: C-8325
Unicel C-8325 Replacement Cartridge Filter
The Unicel C-8325 is a replacement pleated cartridge filter element designed for select pool and spa cartridge filter housings. It’s built to capture fine debris while maintaining steady circulation when rinsed and cleaned on a regular schedule.
Key Features
- Replacement cartridge filter element for compatible filter canisters
- Pleated media increases surface area for effective debris capture
- Rigid inner core and reinforced end caps for repeated cleaning cycles
- Helps restore water clarity and reduce strain on the pump compared to running a clogged cartridge
Before You Buy
- Match by part number (C-8325) whenever possible.
- Confirm fit by measuring your existing cartridge:
- Overall length
- Outside diameter
- Top and bottom end-cap style (open, closed, handle, or threaded)
- Inside diameter of any open ends (standpipe opening)
- If your filter uses a center standpipe, verify the cartridge’s inside opening matches the standpipe size and seals correctly.
Common Signs It’s Time to Replace
- Pleats are torn, frayed, or separating from the end caps
- Cartridge won’t clean up well even after a deep soak and thorough rinse
- Filter pressure rises quickly after cleaning or circulation remains weak
- End caps are cracked/warped or the core is collapsing
Related Products
- Unicel C-8325 (Shop / Options)
- Cartridge Filter Cleaner
- Cartridge Cleaning Wands
- Filter Tank O-Rings & Gaskets
- Filter Pressure Gauges
- Skimmer Socks (Fine Debris Pre-Filter)
Maintenance Tips
- Rinse the cartridge when pressure rises about 8–10 PSI above your clean starting pressure (or when flow drops).
- Spray between pleats from top to bottom and rotate the cartridge as you clean for a more thorough rinse.
- Deep clean periodically to remove oils and fine debris; rinse thoroughly before reinstalling.
- Let the cartridge dry after deep cleaning when possible—drying helps loosen fine debris for easier rinsing.
- Keep water chemistry balanced to reduce premature clogging and scale buildup.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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