culchie23 Posted November 19, 2015 Report Share Posted November 19, 2015 I have a Strong Spas Evolution Elements II spa I purchased from Costco some time ago. There's no mention of the replacement filter model in the manual. And I don't see anything on the filter itself. Was hoping someone had the same spa, or could tell me how to find the # through cross reference or something. Thanks. Quote Link to comment Share on other sites More sharing options...
Dr. Spa Posted November 19, 2015 Report Share Posted November 19, 2015 Exact measurements. http://www.rhtubs.com/store/filter-size.htm Quote Link to comment Share on other sites More sharing options...
culchie23 Posted November 19, 2015 Author Report Share Posted November 19, 2015 Thanks for the chart. It really helps. My filter is 4 15/16" x 13 5/16" with 2 1/8" inside holes on top and bottom. I guess I need to count the pleats. What is it asking the Sq. Ft. of ?? Quote Link to comment Share on other sites More sharing options...
Dr. Spa Posted November 19, 2015 Report Share Posted November 19, 2015 Just go with the C-4950. It's probably the most popular cartridge there is. (the Sq. Ft. is how many square feet of filter area there is). Quote Link to comment Share on other sites More sharing options...
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