Review on 🔍 Premium Compatibility: CFS Complete Filtration Services 4-Pack for WHKF-WHSW String Wound 5 Micron Sediment Water Filters (Est. 2006) by Tina Brown

They're about 1/8 inch longer than spa filters. When I first installed one it leaked like crazy but I learned and was able to use them with a wrench and screw the filter cup really tight. It takes a little "effort" to remove the filter cup again when you need to replace it. I'm not sure I would recommend them to the average consumer. Definitely not an exact replacement. If this helped you, please click "helpful" below.