Cobalt Protein Skimmer pumps are high quality Italian made replacement pumps for your skimmer. Each model features a venturi and matched needle wheel impeller designed together to maximize water and air mixture and ensure optimal bubble size. The 4-8 model features 1/2 Female threaded NPT fittings and a 300gph flow rate. The 12-16 model features 3/4 Female threaded NTP fittings and a 575gph flow rate.
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