Attwood 5505-7 Sahara MK2 S500
- 12 volt DC, 500 GPH (8.33 gpm)
- 7.5 feet maximum lifting height
- Automatic operation with X-Air Impeller
- Elbow and straight fittings, non-return valve included
- Direct replacement for Attwood 4505-7, 1 year warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An automatic bilge pump made as a direct swap for an older Attwood model, shipping with fittings and a non-return valve. The listing gives no wiring or float detail beyond automatic operation.
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ASIN: B09B3LT7S5Model: 5505-7Category: Bilge Pumps
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Overview
A boat owner swapping out an older Attwood pump gets the Sahara MK2 S500 with two outlet styles, a backflow valve and a washer in the box. An X-Air Impeller is described as preventing air-locks and protecting against dry running.
Dropping into the same position as the model it replaces makes the swap simple, and the pump is described for both freshwater and saltwater use. The listing says little about wiring, float operation or switch options, so check the instructions in the box.
Who it's for
Small-boat owners who want a like-for-like automatic bilge pump with fittings included. Anyone with a bigger bilge, or a setup that needs a different voltage or a wiring diagram, should confirm details before buying.
Pros and cons
- Direct replacement for the 4505-7
- Two outlet fittings included
- Non-return valve in the box
- Dry-run protection described
- Wiring details not listed
- Float operation not described
- Modest flow rate for large bilges
Performance notes
The impeller moves water out of the bilge, and the X-Air design is meant to prevent air-locks that stop a pump from priming. The lifting height limits how far above the pump the discharge can sit, and the non-return valve stops water running back.
Specifications
| Brand | attwood |
|---|---|
| Model | 5505-7 |
| Dimensions & fit | |
| Item Dimensions L x W x H | 8.2 x 3.5 x 4.1 inches |
| Maximum Lifting Height | 7.5 feet |
| Weight | 13.76 ounces |
| Capacity & performance | |
| Flow Rate | 500 GPH (8.33 gpm) |
| Power & efficiency | |
| Voltage | 12 volts DC |
| Construction & materials | |
| Material Type | Plastic |
| Compatibility & installation | |
| QUICK & EASY INSTALLATION | Simplified setup and servicing for hassle-free use |
| Included components | |
| Included Components | Unit, instructions, washer, non-return valve, 90 degree outlet, straight outlet |
| Warranty & support | |
| Manufacturer Warranty Description | 1 Year |
| Other details | |
| Product Style | Automatic, 500 GPH |
| AIR-LOCK ELIMINATION | Patented X-Air Impeller clears trapped air for reliable pumping |
| ONE-HAND CARTRIDGE RELEASE | Fast access in tight spaces |
| STEADYSWITCH TECHNOLOGY | Smart buoyancy control minimizes battery drain |
Closest rivals on specs
Johnson Pumps 32903 Cartridge Bilge Pump with Dura-Port- Maximum Lifting Height 7.5 vs 3 feet (+150%)
Rule 25SA, 12V Automatic Bilge Pump - Fully Submersible - 500GPH- Maximum Lifting Height 7.5 vs 1.75 feet (+329%)
Frequently asked questions
How do I install the Attwood 5505-7 Sahara bilge pump?
The box includes instructions, a washer, a non-return valve, a 90 degree outlet and a straight outlet. The listing gives no wiring steps, so follow the supplied instructions.
Does the Attwood 5505-7 replace the 4505-7?
Yes. The title calls it a direct replacement for the Attwood 4505-7.
Can the Attwood 5505-7 be used in salt water?
The description says it is built for durability in both freshwater and saltwater.