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What a Vac Lock Does
chemical balancing
Extend tablet life for better value
Also commonly listed for the Polaris P39 pressure-side pool cleaner
Unicel C-7470-4 Pool Filter Cartridge Set (4 Pack) Jandy What a Vac Lock DoesThe Unicel C 7470 4 Filter Cartridges (4 Pack) is a complete replacement set designed to restore proper filtration performance in Pentair Clean & Clear Plus 320 and Waterway Crystal Water 325 pool filter systems. Each cartridge provides 80 square feet of filtration area, delivering a combined 320 sq. ft. total when installed as a full set. Cartridge filters gradually become loaded with oils, fine debris, and contaminants that cannot be fully removed
