Multi-Stage Water Pumps - Single Stage Sea Water Pumps

1 Stage Stainless Steel Sea Pump

• Base Pump with no inlets and outlets
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

1 Stage Stainless Steel Sea Pump with 1 Groove Pulley & Single 1” NPT Inlet/Outlet

• 1” NPT inlet and outlet
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

Available in: Aluminum for fresh water use or Stainless Steel for use in salt water with 1” NPT inlet/outlet and optional 1-1/4” custom billet hose barbs.

1 Stage Stainless Steel Sea Pump with 2 Groove Pulley & Single 1” NPT Inlet/Outlet

• 1” NPT inlet and outlet
• Pump churns out up to 20% more water than a stock factory pump.

The Extreme single stage pump is the perfect choice for a stock or slightly modified engine. It is designed with large 1” NPT inlet and outlet flanges that deliver the flow of water more efficiently than a stock single impeller OEM pump. By allowing direct inlet water flow these pumps churn out up to 20% more water than a stock factory pump. These pumps are fully rebuildable and will be the last pump you ever buy!

Available in: Aluminum for fresh water use or Stainless Steel for use in salt water with 1” NPT inlet/outlet and optional 1-1/4” custom billet hose barbs.

Basic Single Stage Sea Pump Service Kit

These kits consist of all the basic service related parts needed to rebuild a Hardin Marine Multi-Stage sea pump as well as many other multi-stage pumps on the market today. Each kit comes with the necessary sealing o-rings, impeller, and stainless steel wear plates.

Hardin Single Stage Gen. 1 Sea Pump Master Rebuild Kit

Replace all the bearings, seals, o-rings, clips, wear plates and impeller on your Hardin Single Stage Sea Pump.

Gen. 1 Pumps have Black, Hardcoated, Billet Aluminum Rear Covers.
Gen. 2 Pumps have Polished, Cast Stainless Steel Rear Covers with a bolt in the center. The name Hardin Marine is cast into the cover.

Hardin Single Stage Gen. 2 Sea Pump Master Rebuild Kit

Replace all the bearings, seals, o-rings, clips, wear plates and impeller on your Hardin Single Stage Sea Pump.

Gen. 1 Pumps have Black, Hardcoated, Billet Aluminum Rear Covers.
Gen. 2 Pumps have Polished, Cast Stainless Steel Rear Covers with a bolt in the center. The name Hardin Marine is cast into the cover.

This is a factory rebuild of your pump. New wear plates, O-rings, Bearings, Seals and Impeller will be installed. You will need to send your pump in to rebuilt. The shipping costs charged at checkout are for returning your pump to you. We will contact you with details when ordered. Click here to find out if you have a Gen 1 or Gen 2 sea pump. All pumps are pressure checked when the rebuild is complete. If our team finds any other issues during the rebuild process, they will contact you with an updated quote.