40 sq. ft. top load.
1-1/4" SAE Thread has an outside diameter of approximately 1-11/16".
4CH-940 replaces: Filbur FC-0177 UPC 645544001771. Pleatco PDO-UF40P2 UPC 090164401102. OEM 1561-13. Unicel UPC 678285240130.
Commonly used in: Dimension One 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.