Rule
Rule-Mate 500 GPH Automatic Bilge Pump, 12V
Fully automatic 500 GPH bilge pump with a built-in electronic float. No separate switch to install or fail.
$69.99
Johnson Pump
Johnson Pump Ultima Electronic Bilge Switch, 12/24V
Electronic bilge switch with no moving parts that ignores oil sheen and only switches on water.
$54.99
🚚 Free shipping when your order reaches $99 · Ships in 1–2 business days · In stock
Not sure it fits? Ask a technician →- No moving parts
- Discriminates water from oil sheen
- Works with 12V and 24V systems
- Built-in on/off delay
- Compact footprint
↩️ 30-day returns🔒 Secure Stripe checkout🧰 Tech support (352) 604-0577
About this product
Mechanical floats stick. The Ultima Switch uses electric field sensing to detect water and is designed not to trigger on oil or fuel residue, helping you stay compliant with discharge regulations. A built-in delay prevents short-cycling in choppy water.
Specifications
| Brand | Johnson Pump |
|---|---|
| Voltage | 12V / 24V DC |
| Type | Electronic field sensing |
| Item # | GMS-1005 |
Specifications are provided by the manufacturer. Always verify fitment for your vessel.
Questions
How long will it take to arrive?
Most orders ship within 1–2 business days from authorized distribution and arrive in 2–6 business days in the continental US.
Will this fit my boat?
If you're not sure, call or text (352) 604-0577 with your boat or engine details and a technician will confirm before you order.
Can I return it?
Yes. New, uninstalled items in original packaging can be returned within 30 days.
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