Automatic Bilge Pumps
Dependable Automatic Bilge Pumps — Keep Your Boat Dry and Safe
Stay protected from unexpected flooding with automatic bilge pumps from The Outdoor Warehouse. These marine-grade pumps automatically detect water levels and activate without manual control, keeping your bilge clear whether you’re aboard or away. Featuring trusted brands like Rule, Johnson Pump, Attwood, and SEAFLO, our automatic bilge pumps deliver reliable performance in harsh marine conditions.
Why Choose an Automatic Bilge Pump?
Automatic bilge pumps use built-in float switches or electronic sensors to monitor water levels. When water rises above a certain point, the pump activates automatically — then shuts off once the bilge is dry. This ensures continuous protection without manual oversight, which is essential for:
- Docked boats exposed to rain or hull seepage.
- Offshore trips where bilge access is limited.
- Liveaboard and unattended vessels that need 24/7 monitoring.
Popular Automatic Bilge Pump Options
| Brand | Flow Rate (GPH) | Switch Type | Key Features |
|---|---|---|---|
| Rule-Mate Series | 500–2000 GPH | Integrated electronic sensor | Fully automatic, no separate float switch required |
| Johnson Pump Ultima | 600–2200 GPH | Solid-state electronic sensing | Moisture sensor activation, no moving parts |
| SEAFLO Automatic Pump | 500–1500 GPH | Float switch | Compact, low current draw, corrosion-resistant housing |
| Attwood Sahara Series | 500–1200 GPH | Built-in float switch | Easy install, quick-connect discharge ports |
How to Choose the Right Automatic Bilge Pump
- Capacity (GPH): Match pump size to boat length and compartment volume — typically 1000 GPH per 20–25 feet.
- Switch Style: Integrated or external float switches; electronic sensors offer longer life.
- Power: Most run on 12V DC systems; check current draw and fuse size.
- Discharge Size: Commonly ¾” or 1” hose outlets — match your bilge plumbing.
- Mounting: Consider pump base footprint and vertical clearance.
Pro Tip
Pair your automatic bilge pump with a bilge pump switch or manual backup pump for complete redundancy. For clean installations, use bilge hoses and mounting bases.
Why Buy Automatic Bilge Pumps from The Outdoor Warehouse?
- Trusted marine brands: Rule, Johnson Pump, Attwood, SEAFLO, and more.
- Expert support: We help match the right flow rate and voltage for your boat.
- Marine-grade durability: Corrosion-resistant materials built for long-term reliability.
- Fast shipping and responsive U.S. customer service.
Frequently Asked Questions
How does an automatic bilge pump know when to turn on?
It uses a float switch or electronic sensor to detect water levels. When the bilge fills to a preset point, the pump activates automatically.
Do I still need a manual pump if I have an automatic one?
Yes — a manual or backup bilge pump provides redundancy in case of electrical failure or excess water volume.
What size automatic bilge pump do I need?
Smaller boats (under 20 ft) can use 500–800 GPH pumps; larger boats often need 1500–2000 GPH or multiple units for effective drainage.
How do I wire an automatic bilge pump?
Use marine-grade wire and a properly rated fuse. Always connect to a 12V DC circuit with waterproof connectors and follow ABYC wiring standards.
Shop dependable automatic bilge pumps at The Outdoor Warehouse — trusted marine-grade protection to keep your vessel dry and safe.
