Tiger River Hot Tub Replacement Filters

Tiger River was a separate Watkins Wellness line, sold alongside Hot Spring from 1992 to 2010. Unicel's cross-reference lists one cartridge for the entire line: 65 sq ft, 8-1/2 inches in outer diameter, 10-1/2 inches long, carrying Watkins OEM number 31114. It sells as Pleatco PWK65, Unicel C-8465, and Filbur FC-3960, which are the same cartridge in different boxes.

One thing to check before ordering. Pleatco's catalog also files the Rainbow drop-ins PRB25-IN and PRB50-IN under Tiger River, so some tubs in this line take a narrower 5-inch drop-in instead of the 8-1/2 inch cartridge. Pull your cartridge and read the end cap. The 3 Tiger River models below cover what we have on file.