Unicel 5CH-402 Replacement Spa Filter Cartridge for Del Sol, Sundance & Jacuzzi Premium Spas | 40 Sq. Ft. | 6540-723 C8311 If you are replacing both

If you are replacing both adapters at a single equipment connection as part of a planned service

clean the shaft groove thoroughly and apply a thin coat of silicone-based lubricant to seat the O-ring evenly and extend its service life

and washers UPC 610377054584 Fits Into

Works with any sanitizer

Unicel 5CH-402 Replacement Spa Filter Cartridge for Del Sol, Sundance & Jacuzzi Premium Spas | 40 Sq. Ft. | 6540-723 C8311 If you are replacing bothThe Unicel 5CH 402 is a 5CH Series 40 sq. ft. replacement spa filter cartridge engineered for Del Sol, Sundance, and Jacuzzi Premium spa models originally equipped with OEM part number 6540 723. With 204 pleats of 3 oz. Reemay 2033 filtration media and a 2" male thread (MPT) bottom connection, it delivers reliable filtration performance as a direct cross reference replacement. IMPORTANT: Dimensional Difference vs. OEM Original Per Unicel's cross