Filters for Arctic Spas
Most Arctic spas use one of two models of cartridge filter, which as you know can be cleaned in a 'filter-soak' chemical and re-used.
The external dimensions of the filter cartridge are the same - you should find that these are 13 1/4" long (338mm) x 5" diameter (127mm), with 2 1/8" holes (55mm) at each end.
From the outside the two models of filter look the same. However, in one the pleats have a surface area of 25 sq.ft. and in the other the pleats have a surface area of 50 sq ft. You can use either cartridge - it just depends if your hot tub has a heavy or light level of use, and you can choose accordingly.
The Pleatco PRB 25-IN is 13 1/4" long (338mm) x 5" in diameter (127mm), with 2 1/8" holes (55mm). Yours might carry a Rainbow reference number of 17-2327 or a Unicel Ref.No of C-4326.
The Pleatco PRB 50IN is 13 1/4" long (338mm) x 5" in diameter (127mm), with 2 1/8" holes (55mm). Yours might carry a Rainbow reference number of 17-2380 or a Unicel Ref.No of C-4950, or a Waterways number 817-5000.
If your filter is a different size - just call or e-mail us as we have many others in stock!