Overview Meet the Macaberry PBF40M Spa Filter Replacement. This 4 pack is designed to replace compatible Pleatco PBF40M and Bullfrog Wellspring cartridges, offering reliable filtration for your spa or hot tub so you can relax with cleaner water between maintenance sessions. Each cartridge uses premium filtration fabric and chlorine resistant end caps, built to withstand typical spa chemistry and a range of temperatures. The result is consistent filtration performance that helps keep your spa water clearer and smoother to the touch during use. Key Benefits Premium filtration fabric helps capture hair, leaves, dust, sediment, and other particulates. Dirt-Locking design improves removal efficiency compared to standard fabrics, supporting longer spa water clarity between cleanings. Chlorine resistant end caps help extend cartridge life in common spa environments. 4-pack ensures you have ready replacements on hand for routine maintenance. Compatibility & How to Use Compatible with Pleatco PBF40M, Pleatco PBF40-M, and Bullfrog Wellspring 30 Coreless 10-00282 filter cartridges. Note: Not compatible with STIL spas from 2018 model year. Product dimensions are: top hole 3 3/8 inch, bottom hole 4 1/2 inch, overall diameter 8 inch, and length 6 1/4 inch. This helps verify fit for common spa assemblies. Easy care tip: remove the cartridge before cleaning with disinfectant to help minimize corrosion risk. When it’s time for a refresh, these cartridges rinse clean and can be reused after proper cleaning where applicable. Quality you can trust Note that this is a non OEM replacement. We provide compatible alternatives designed to deliver reliable filtration performance while offering good value for regular spa maintenance. Brand names and logos referenced are the property of their respective owners. FAQ Q: What’s included in the 4-pack and which spas is it compatible with? A: A four-pack of PBF40M-compatible cartridges; compatible with Pleatco PBF40M, Pleatco PBF40-M, and Bullfrog Wellspring 30 Coreless 10-00282. Not compatible with STIL 2018 spas. Q: How often should I replace the cartridge? A: Replace every 1–2 months to maintain spa performance, depending on usage and water quality.