Johnson Pumps 32903 Cartridge Bilge Pump with Dura-Port
- 1000 GPH cartridge pump with Dura-Port
- 12 volts, lifts water 3 feet
- 8 x 6 x 4 inches, 14.4 ounces
- Plastic body, black
- Limited warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A cartridge bilge pump rated at a thousand gallons per hour for boats with a hard-wired electrical system. The listing has several unclear entries, including power type.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B000N9REY8Model: 32903Category: Bilge Pumps
Overview
Johnson Pump builds this cartridge bilge pump around a replaceable cartridge and a Dura-Port outlet, in a black plastic body. It runs on boat battery voltage and is meant to be wired into a boat to clear bilge water.
A high flow rating for its size makes it a strong choice for clearing a bilge in a smaller boat, and the cartridge design suits boats already set up for it. The spec table lists a flow of gpm and a music product style, which look like errors.
Who it's for
Owners of small to mid-size boats with battery wiring who want a dependable bilge pump. Anyone buying for a portable job should look at a battery-powered model.
Pros and cons
- High listed flow rating
- Compact plastic body
- Runs on boat battery voltage
- Power source entry unclear
- Spec table has obvious errors
- Lift height is modest
Performance notes
Flow depends on supply voltage and on how high the water has to be lifted, and the pump moves less as the discharge hose gets longer or higher. The listed lift is modest, so keep the outlet close to the waterline.
Specifications
| Brand | Johnson Pump |
|---|---|
| Model | 32903 |
| Dimensions & fit | |
| Item Dimensions L x W x H | 8 x 6 x 4 inches |
| Maximum Lifting Height | 3 feet |
| Weight | 14.4 ounces |
| Item Package Weight | 8 pounds |
| Package Dimension | 10 inches L x 9 inches W x 8 inches H |
| Capacity & performance | |
| Flow Rate | 1000 GPH |
| Power & efficiency | |
| Power Source | AC/DC as listed |
| Voltage | 12 volts |
| Construction & materials | |
| Material Type | Plastic |
| Color | Black |
| Warranty & support | |
| Manufacturer Warranty Description | Limited warranty |
| Other details | |
| Fit Type | Universal Fit |
Closest rivals on specs
Rule 25SA, 12V Automatic Bilge Pump - Fully Submersible - 500GPH- Maximum Lifting Height 3 vs 1.75 feet (+71%)
Attwood 5505-7 Sahara MK2 S500- Maximum Lifting Height 3 vs 7.5 feet (-60%)
Frequently asked questions
Is the Johnson Pump 32903 rated 1000 gpm?
No. The title says 1000 GPH, gallons per hour, and the spec table's gpm entry is almost certainly a typo.
Does the Johnson Pump 32903 run on AC power?
The spec table says AC/DC, but the voltage is 12 volts, so it is a low-voltage boat pump.