Unicel Replacement Filter Cartridge for 125 sf Sundance | C-8325

Unicel SKU: C-8325
Unicel Replacement Filter Cartridge for 125 sf Sundance | C - 8325 - Cartridges - img - 1

Unicel Replacement Filter Cartridge for 125 sf Sundance | C-8325

Unicel SKU: C-8325
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$79.99
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Questions about returns? View our return policy.
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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

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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: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

  • We do not ship on Saturday or Sunday.
  • Orders totaling more than $300 will require signature confirmation upon delivery.
  • We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
  • Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
  • Expedited shipping options are available at checkout.

Return Policy:

  • Products that are received damaged will receive a refund in store credit.
  • Most products are eligible for return within 30 days of receipt, except where noted below.
  • To initiate a return, please complete an RMA form prior to sending your item back.
  • Original shipping costs are non-refundable and will be deducted from the return credit.
  • Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
  • Some returns will be charged an automatic 15% restocking fee.
  • We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
  • Please complete the return form to receive your RMA number and return shipping label.
  • Chemical products are not eligible for return under any circumstances.
  • The Pentair Colorsync 618031 is not eligible for return.
  • Pool cleaners are not eligible for return.
  • Opened seals and o-rings are not eligible for return.
  • Capacitors are not eligible for return.
  • Plastic popup tools are not eligible for return.
  • Automation components and circuit boards are not eligible for return.
  • If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
  • Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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