Quick Summary
The Johnson Pump 05903-00 Cartridge Combo Automatic Submersible Bilge Pump is a 12V bilge pump with a stated flow rate of 1000 GPH. It is described as automatic and includes an electro-magnetic float switch for automatic operation.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Brand | Johnson Pump. Useful for identifying the exact pump line. |
| Model | 05903-00. Important for matching the exact unit. |
| Product type | Cartridge Combo Automatic Submersible Bilge Pump. Helps confirm the pump style and intended category. |
| Voltage | 12V. Check this against the power system you plan to use. |
| Flow rate | 1000 GPH. Compare this capacity with the amount of water you expect the pump to move. |
| Color | Red. Useful when color is part of the chosen variant. |
What to Compare Before Buying
- Voltage: This model is listed as 12V, so compare it with your available power setup.
- Flow rate: The stated capacity is 1000 GPH. Check whether that output level matches the amount of water you need to move.
- Automatic operation: The pump uses an electro-magnetic float switch for automatic operation. Consider whether that control style matches your preference.
- Discharge setup: It includes straight and 90° smooth elbow Dura-Port discharge ports plus a removable check valve. Check whether those included parts fit your planned installation.
What Is Included
- Johnson Pump 05903-00 cartridge combo automatic submersible bilge pump
- Straight Dura-Port discharge port
- 90° smooth elbow Dura-Port discharge port
- Removable check valve
Before You Decide
Confirm the 12V power requirement, the 1000 GPH flow rate, and the included discharge parts before choosing an offer. If the automatic float-switch operation matters for your setup, make sure it matches your installation plan.
Common Buyer Questions
Does this pump operate automatically?
Yes. It is described as automatic and uses an electro-magnetic float switch for automatic operation.
What is the flow rate?
The stated flow rate is 1000 GPH.





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