Unicel C-7472 fits the following filter models:
-Pentair Pac Fab Clean & Clear Plus 520 (made after 11/98: for those made before 11/98 see product Unicel C-7498)
-Waterway Crystal Water 525
-Waterway Crystal Water 500
NOTE: Four Unicel C-7472 filter cartridges are required for the models above, both top and bottom filter ends are open with 3 inch inside diameter
Unicel C-7472 replaces the following filter cartridges:
Pac Fab pool filter 178585
Waterway pool filters 817-0131 or 817-0143 (8170131 or 8170143)
Pentair pool filter R173578
125 sq. ft. x 4 qty. = 500 sq. ft. (fits 520, 525 sq. ft. models)
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