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Does anyone know the right filter for a Key Backyard Spa 331?

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Key backyards went out of business.
Most common filter was a standard 50 sq. foot cartridge element.
Unicel C4950 is a common filter. Pleatco and Filbur are other brand manufacturers of replacement filter cartridges.
FIT Pool spa C4950 UNICEL 4950 PLEATCO PRB50 IN FC 2390

if you think this is the one, we got lucky. If not, please go to the comment section of this thread and provide the information of where your filter should go. Maybe even upload a picture of this area and we would be able to help you better.

Posted on Apr 10, 2015

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  • Greta Zeit
    Greta Zeit Apr 12, 2015

    Hi Mike, I think this is the one ... the measurements seem about right. Thanks so much for your assistance. I'll order it. Is this your company?

  • Mike Tellegen Apr 12, 2015

    I own and Operate 'The Pool & Spa Medic'. Glad I was able to help!

  • Greta Zeit
    Greta Zeit Apr 12, 2015

    where are you located? do you have a web site?

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Posted on Jan 02, 2017

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