CAT 2000, 4000, 5000 Molded Flow Cell

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This is the Hayward Molded Flow Cell replacement for CAT and HCC pool chemistry controllers. It works with CAT models 2000, 4000, and 5000. This replacement flow cell is used to cr eate a small body of sample pool water for the two probes to test from. Pool water is connected into this flow cell and passes over the probes and back into the pool. It can also be used as a manual pool water testing point. Purchase the accessories to this flow cell separate such as the valves, probes and tubing. Show more