Most Popular Filter Cartridges

This filter cartridge is 9" Tall x 6' Wide and features a 1 1/2" MPT screw in nipple which measures about 1 13/16" to the outside of the threads. This filter is found in LA and Advanced spas and more.     Diameter 6" Length 9" Top Style...

You are buying an anti-microbial replacement filter for Eco-Pur applications in 2002+ Master Spas and Down East Spas. This filter is found on the inside of a larger filter and usues the stalk system with a center stalk and a threaded cap. You can find...

This filter Fits some Dimension One and At Home Hot Tubs after 2000.. It is 10 1/2" Ta x 7 1/8" Wide has a closed top with castle tabs and features a butterfly type twist lock bottom where you slide it down over the butterfly hole in the filter housing...

This filter fits Jacuzzi Premium Hot Tubs J-300, J-400 Series. It is 15 1/2" Tall and 6 5/8" Around and Features a 2" SAE which is a Thick Thread and measures a hair less than 2" Inside diameter and measures 2 3/8" to the outside of the threads. There...

 This filter is 13 1/2" X 4 15/16" and has a female SAE Large Thick Thread that is 2" which would really nmeassure about 2 1/4-2 3/8" ID. This filter is found in Four Winds Tubs, Barefoot and others. If you have the shorter verison of this filter...

This Filter cartridge is 5 5/16" Wide X 10 1/8" Tall.. It has a 2 1/8" hole on the top and bottom... it is 45 Sq Ft and is found in a lot of different brands... Dynasty Spas, Garden Leisure, Leisure Bay, Recreation Warehouse, Rainbow,Pentair,...

This filter is found only in Sundance Hot Tubs that is 19" long x 8 1/2" Wide and it has a hole in one end that is 2 1/2" and a nipple on the other end that is 2". This filter can be used in place of the old style filter combination one filter number...

This filter is 9 3/4" Tall x 4 5/8" Wide and is closed on the top and has a 1 1/2" mpt thin threaded nipple that measures about 1 13/16" across the threads. This filter fits some of the Jacuzzi Whirlpool hot tubs that are found under the names Jacuzzi...

This Filter Cartridge fits Some New Cal Spa and Marquis Spas. It is 12 1/2" Tall x 5 3/16" Wide with 2" Mpt Threads which is a think thread that measures about 2 3/8" outside diameter. The MPT Threads measure between 2 1/4 and 2 3/8" edge to edge. It...

This part is a 35 Square Foot Filter Cartridge that is 4-15/16" Outside Diameter x 9-1/4" in Length. It has a hole in the top and the bottom that are 2 1/8". This Filter (The Most Popular) is found many Spa Hot Tub Brands Aber , After Hours , Belize ,...

This Filter is a 30 Square Foot Filter Cartridge that Fits after some 1990 Hot Spring Hot Tubs by Watkins is 6" Outside Diameter x 10 1/2" in Length and has a 1 15/16" top and bottom hole.This fits HotSpring brand tubs only and some of these tubs have as...

This filter is this most popular size and fits 70% of all tubs it is a 25 Square Foot Filter Cartridge that is 4-15/16" Outside Diameter x 13-5/16" in Length. It has a hole in the top and the bottom that are 2 1/8". Don't just order this filter though be...