Unicel's 2001 Replacement Guide
4CH Series

4CH Series cartridges with male threaded fitting replace any cartridges which have an MPT 
or a 1.9" i.d. with disposable adapter.

Outside Diameter Length Top/Bottom Pleat Count Identification Unicel P/N
4-5/8" 4-5/8" Top: Molded cone handle
Bot: 1-1/2" male threaded fitting
199 13 sq. ft. top load 4CH-19 (3 oz.)
4-5/8" 6-3/4" Top: Molded cone handle
Bot: 1-1/2" male threaded fitting
204 20 sq. ft. top load 4CH-20 (3 oz.)
4-5/8" 8" Top: Molded cone handle
Bot: 1-1/2" male threaded fitting
158 19 sq. ft. top load 4CH-21 (4 oz.)
4-5/8" 9-3/4" Top: Molded cone handle
Bot: 1-1/2" male threaded fitting
173 25 sq. ft. top load 4CH-24 (3 oz.)
4-5/8" 11-7/8" Top: Molded cone handle
Bot: 1-1/2" male threaded fitting
158 30 sq. ft. top load 4CH-30 (4 oz.)
4-5/8" 16" Top: Molded cone handle
Bot: 1-1/2" male threaded fitting
145 35 sq. ft. top load 4CH-35 (4 oz.)
4-5/8" 14-3/4" Top: Molded cone handle
Bot: 1-1/2" male threaded fitting
225 50 sq. ft. top load 4CH-50 (3 oz.)
4-5/8" 19-5/8" Top: Molded cone handle
Bot: 1-1/2" male threaded fitting
217 65 sq. ft. top load 4CH-65 (3 oz.)
4-5/8" 12" Top: Molded cone
Bot: SAE fitting
139 25 sq. ft. top load
D-One Spas
4CH-950 (3 oz.)
4-5/8" 15" Top: Molded cone
Bot: SAE fitting
176 40 sq. ft. top load
D-One Spas
4CH-940 (3 oz.)

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