25 sq. ft. top load (Common in Softtubs).
1-1/2" MPT thread has an approximate outside diameter of 1-13/16".
6CH-25 replaces: Filbur FC-0305 UPC 645544003058. Pleatco PTL20W-SV-P4-4 UPC 090164999340. Unicel UPC 678285260015.
Commonly used in: Softub, Sunrise Spas and others.
PuraSpa® Filters are quality pleated filters, made with Reemay® Filtration Fabric. We may substitute with Unicel® brand filters, another quality hot tub filter.