Submersible Marine HVAC Air Conditioning Pumps. Keep Cool On Your Boat Or Yacht with a Koolair PM500, PM1000 Or SPM1000 Pump. These Koolair Pump series models are epoxy encapsulated. This allows them to run fully submerged in many liquids and also in open air for complete moisture protection. Since these coolant pumps can be submerged, they are also used in fountain display pumping applications.

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