20 sq.ft. Cartridge Filter Top Load 4CH-20 FC-0125 Diameter…………………………………4-5/8″ Length……………………………………6-3/4″ Top End Cap: id/config……………../ molded cone handle Bottom End Cap: id/config…………/ 1-1/2male thread/MPT Used on: Master Spas Saratoga Spas Softub Vita Spas Note: Remove “pad adapterfrom the skimmer before threading Unicel MPT directly into the suction fitting. OEM P/N PVT 25 Note: Replaces any cartridge that has an MPT fitting or a 1.9″ id with disposable adapter.

28 sq. ft. Cartridge Filter Martec, Sonfarrel C-4301 FC-1610 Diameter…………………………………4-15/16" Length……………………………………14-7/8" 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: Advantage Mfg. OEM P/N ELE-25 (top load) Martec OEM P/N CL-2200 Nordic Hot Tubs Sonfarrel OEM P/N 220122 Thermo Spas of Connecticut

50 sq. ft. Cartridge Filter Whirlswimming pool, Nemco 4CH-50 FC-0151 Diameter…………………………………4-5/8″ Length……………………………………14-3/4″ Top End Cap: id/config……………../ molded cone handle Bottom End Cap: id/config…………/ 1-1/2male thread/MPT The top load cartridge is used on: Dimension One Spas OEM P/N 1561-05 Dynasty Spas Florida Whirlswimming pool Nemco OpuSpas Note: Replaces any cartridge that has an MPT fitting or a 1.9″ id with disposable adapter.

40 sq. ft. Cartridge Filter Sundance C-4440 FC-2710 Diameter…………………………………4-5/8″ Length……………………………………16-3/4″ Top End Cap: id/config……………../ castle Bottom End Cap: id/config…………2-1/16″ / open The cartridge is used on: Sundance Spas OEM P/N 6540-495 Note: 2-1/16″ bottom id for 1-1/2″ system. Unicel part replaces both 7-1/2″ and 8″ OD Sundance cartridges.

25 sq.ft. Cartridge Filter Icon Spas C-4329 FC-0210 Diameter…………………………………4-1/4" Length……………………………………12" Top End Cap: id/config……………../ semi-circular handle Bottom End Cap: id/config…………2" / open Used on: Pleatco Icon Spas Weslo Spa Model # 410, OEM P/N 176380

25 sq. ft. Cartridge Filter Santanna C-4328 FC-2650 Diameter…………………………………4-15/16" Length……………………………………9-13/16" Top End Cap: id/config……………../ closed Bottom End Cap: id/config…………2-1/8" / open The cartridge is used on: Santanna

15 sq.ft. Cartridge Filter Pleatco, Softsider, Vita Spas C-4303 FC-0185 Diameter…………………………………4-5/8" Length……………………………………6-3/4" Top End Cap: id/config……………../ molded cone handle Bottom End Cap: id/config…………1-9/10" / open Used on: Pleatco Softsider Spas Softsider Spas Vita Spas Note: Unicel replacement needs a 1-1/2” PVC pipe nipple/PAD adapter (not furnished).

50 sq. ft. Cartridge Filter Cal Spas, Martec, Sonfarrel C-4305 FC-1618 Diameter…………………………………4-15/16" Length……………………………………14-7/8" 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: Advantage Mfg. Cal Spas Dolphin Martec, OEM P/N CL-2807 Pageant Spas Sonfarrel, OEM P/N 220142 Sundance Spas, OEM P/N 6540-497

Cartridge Filter Rainbow DSF-50, Waterway C-4405 FC-2387 Diameter…………………………………4-15/16″ Length……………………………………6-5/8″ Top End Cap: id/config……………..2-1/8″ / open Bottom End Cap: id/config…………2-1/8″ / open The cartridge is used on: Beachcomber, OEM P/N 3005825 Canspa Mfg. (Canada) Catalina Spas Clearwater Spas Diamond Back Spas Discovery Spas Freedom Spas Liberty, Note: Model dated after 1993. Legend Spas Lifestyle Spas (Canada) Moose Mountain Spas (Canada) Pentair Pool Prod Dynamic Series IV – Model DSF, OEM P/N R173433, 17-2464 Signature Spas Sundance Spas Sunrise Spas Thermo Spas of Connecticut US Tooling & Spa Waterway Plastics Skim filter Note: 2 cartridges per set with stick handle.

65 sq. ft. Cartridge Filter Dimension One 4CH-65 FC-0171 Diameter…………………………………4-5/8" Length……………………………………19-5/8" Top End Cap: id/config……………../ molded cone handle Bottom End Cap: id/config…………/ 1-1/2” male thread/MPT The top load cartridge is used on: Dimension One Spas OEM P/N 1561-06 (65 sq. ft.), 1561-07 (80 sq. ft.) Note: Replaces any cartridge that has an MPT fitting or a 1.9" id with disposable adapter.