Softsider Hot Tub Filters Canada

Get discount cartridges for your Softsider hot tub and maintain your spa water.

18 sq. ft. filter M40121 replaces PSS17.5, C‐4302, FC‐0183 and measures just 4 3/4″ long with a wider diameter of 5″ and top handle with bottom hole measuring 1 7/8″.

This 18 square foot filter is the most popular replacement cartridge for Softsider hot tubs.  Check out our Softub filters for additional types as well as for other soft-sided inflatable spas. Some Softub models use a threaded filter. There are also snap on filters that have small collars and large collars.