Jacuzzi Hot Tub Replacement Filters

Jacuzzi has been making the J-200, J-300, J-400, and J-500 series since the early 2000s, and most of those tubs use the same handful of cartridges. The PRB50-IN (Unicel C-4950, Filbur FC-2390) shows up across the J-200 line and a chunk of the J-300s. Larger and newer models run the 6CH-940 / FC-0359 family. If your tub is from 2002 or later, the cartridge you need is almost certainly listed on one of the 27 model pages below.

Older J-series tubs (pre-2002) used different cartridges that aren't in this database yet. If yours predates the modern J-series, the part number on the existing cartridge end cap will tell you what you actually need.