Our spas use is a Pleatco PWW50 filter.  This is a 50 Square Foot Filter and we utilize two of them to create 100 Square Feet of Filtration in your Spas N Stuff Spa.

For replacement purposes, this filter will cross reference with the following:

• Waterway # 817-0050
• Unicel # 4CH-940
• Filbur # FC 0359

The filter measures 6” diameter x 9.25” from the bottom of the filter to the top of the handle. The threads are coarse thread and stick out 1 3/8” from the bottom of the filter.