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Filbur 6 x 8 1/4", 40 Sf | FC-0359M

FilburManufacturing SKU: FC-0359M

Filbur 6 x 8 1/4", 40 Sf | FC-0359M

FilburManufacturing SKU: FC-0359M
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Questions about returns? View our return policy.
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Filbur FC-0359M Antimicrobial Spa Filter Cartridge 40 Sq. Ft.

The Filbur FC-0359M is a replacement spa filter cartridge designed for select hot tub and spa filtration systems that use a threaded-bottom cartridge. This 40 square foot filter features antimicrobial media and is built to help maintain clean, clear water while supporting dependable circulation in compatible spa systems.

Features

  • Genuine Filbur replacement spa filter cartridge
  • Part number: FC-0359M
  • 40 square feet of filter media
  • Antimicrobial filter media
  • Approximate dimensions: 6 inches outside diameter x 8-1/4 inches length
  • Top style: closed with crescent handle
  • Bottom style: 1-1/2 inch SAE threaded connection
  • Common cross references: Unicel 6CH-940RA and Pleatco PWW50P3-M
  • Common replacement for select Waterway 817-0050 applications

Applications

This replacement cartridge is used in compatible spa and hot tub filter systems that require a compact 40 square foot element with a closed-handle top and 1-1/2 inch SAE threaded bottom. Always verify cartridge dimensions, thread style, and manufacturer part number before ordering.

Important Notes

  • Verify exact cartridge dimensions and bottom thread type before purchase
  • Designed for compatible spa and hot tub filter applications only
  • Replace worn or clogged cartridges promptly to help maintain flow and filtration performance
  • Rinse and clean the cartridge regularly according to your spa manufacturer's maintenance schedule

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Maintenance Tips

  • Rinse the cartridge regularly with clean water to remove trapped debris
  • Deep clean the filter periodically with a cartridge cleaner
  • Inspect the pleats, handle, and threaded bottom for wear or damage during service
  • Keep a spare cartridge available to reduce downtime during cleanings
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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