FAQ

FREQUENTLY ASKED QUESTIONS

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Frequently Asked Questions

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End Users can purchase Johnson Pump products from Big-Box Retailers, Authorized Online Sellers, and Local Marine Dealers

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Centrifugal pumps use momentum of the spinning impeller in contact with a fluid to transfer the rotating force into the fluid and outward through the discharge port. These types of pumps are used in applications where self-priming capabilities are not critical, and water pressure is already supplied to the pump by gravity (gravity fed) or continuously primed via a source such as a seacock or fluid and pump below the waterline.

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Self-priming means the pump can draw fluid through the system without any assistance from another pump, gravity, or primer bulb. Most cases, this is likely a Flexible Impeller Pump (FIP) or Diaphragm pump. The trick is suction contained within the geometry of the pump design.