Rule High Water Bilge Alarm System – 12V
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Rule High Water Bilge Alarm System – 12V
Know the moment water rises in your bilge — before it becomes a problem. This complete high water alarm system from Rule includes everything needed to monitor an unmanned compartment: a float switch that detects rising water, an in-dash gauge, and a dual-mode alarm that triggers both a visual indicator and an 85 dB audible alert the moment the water level reaches the float.
Whether you're at the helm, below deck, or away from the boat, this system gives you an early warning that lets you act before water accumulates to a dangerous level.
What's Included
- Float switch (bilge water level sensor)
- In-dash gauge with visual alarm indicator
- 85 dB audible alarm
Key Features
- Dual-mode alarm — both visual and audible (85 dB) for reliable detection in noisy environments
- Designed for continuous monitoring of unmanned compartments
- Expandable — add additional float switches to monitor multiple compartments from the same gauge
- 12V system compatible with standard marine electrical installations
- Complies with CFR 182.530 — the US federal requirement for a visual and audible bilge alarm in each unmanned space on commercial vessels 26 feet and longer
Specifications
- Voltage: 12V
- Alarm Output: 85 dB audible + visual indicator
- Compliance: CFR 182.530
- Expandable: Yes — supports additional float switches for multi-compartment monitoring
Related Products
- Rule 3-Way Bilge Panel Switch – 12/24/32V
- Rule 500 GPH Automatic Bilge Pump & Switch Combo – 12V
- Rule Bilge Pump 500 GPH – 12V
- Rule 1100 GPH Bilge Pump – 12V
- Rule-Mate Automatic Bilge Pump – 800 GPH, 12V
Parts Desk Insights
This alarm system is the right choice for any boat owner who wants an early warning before water accumulates in the bilge — particularly useful on vessels where the bilge isn’t visible from the helm, or on boats that sit unattended at the dock. For commercial vessels 26 feet and longer operating in US waters, CFR 182.530 requires a visual and audible alarm in each unmanned space — this system satisfies that requirement. The expandable float switch design means you can monitor multiple compartments (engine room, lazarette, forward bilge) by adding additional float switches to the same gauge, which is a cost-effective way to cover a larger vessel. Pair this alarm with a bilge pump and the Rule 3-Way Panel Switch for a complete bilge management system.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.