19 sq. ft. Cartridge Filter Alcove, Dream Maker Spa 4CH-21 FC-0121 Diameter…………………………………4-5/8" Length……………………………………8" Top End Cap: id/config……………../ molded cone handle Bottom End Cap: id/config…………/ 1-1/2” male thread/MPT Used on: Alcove Atera Spas (Four Seasons Home Resort Products) Dream Maker Spas Pageant Spas Saratoga Spa, OEM P/N 20245-238 Vita Spas Note: Remove "pad adapter” from the skimmer before threading Unicel MPT directly into the suction fitting., OEM P/N PVT 25N Note: Replaces any cartridge that has an MPT fitting or a 1.9" id with disposable adapter.

75 sq. ft. Cartridge Filter Rainbow RTL-75, Custom Molded Products C-4975 FC-2395 Diameter…………………………………4-15/16" Length……………………………………20-1/8" Top End Cap: id/config……………..2-1/8" / open Bottom End Cap: id/config…………2-1/8" / open The cartridge is used on the following spas: Custom Molded Products Top Mount Skim, OEM P/N 25390 EZ Twist Top Mount Skim Top Load Pressure Dakota Spas Emerald Spas Hydro Pool Industries Nahani Spas by Maax Pentair Pool Prod Dynamic Series V – DSC-75, OEM P/N R173435 Dynamic Series II & III – RTL/RCF, OEM P/N 17-2632