20 sq. ft. top load.
1-1/2" MPT thread has an approximate outside diameter of 1-13/16".
4CH-20 replaces: Pleatco: PHC25P4 UPC 090164325040. OEM 20241-238, PVT 25. Unicel UPC 678285240024.
Commonly used in: Master Spas, Saratoga Spas, Softub & Vita Spas.
PuraSpa® Filters are quality pleated filters, made with Reemay® Filtration Fabric. We may substitute with Unicel® brand filters, another quality hot tub filter.