Pleatco Filter Cartridge 35 sq. ft. Rainbow Dynamic Series IV | PRB35-IN Vacuum Plates Sanitizer tests are titrations to

Sanitizer tests are titrations to help eliminate color-matching problems

and Sonoma Spa owners without a specific OEM part number

Includes rope surround

Replacing a worn or damaged center core restores proper cartridge seating and ensures full-surface filtration

Pleatco Filter Cartridge 35 sq. ft. Rainbow Dynamic Series IV | PRB35-IN Vacuum Plates Sanitizer tests are titrations toThe Pleatco Advanced PRB35 IN is a 35 sq. ft. replacement filter cartridge engineered for Rainbow Dynamic Series IV and Waterway 35 in line spa filter systems. Built with Pleatco's Point Bonded Pool Filtration Fabric, it delivers a consistent pore structure that resists channeling and maintains reliable filtration performance throughout its service life keeping your spa water cleaner for longer between services. Specifications Filter Area 35 sq. ft.