What is a high-water alarm and why should my boat have one?

A high-water alarm alerts you when the bilge water level rises above normal limits. It provides an early warning of leaks, failed bilge pumps, or flooding, helping prevent serious damage or sinking.

How does a high-water alarm work on a boat?

The alarm uses a dedicated float switch or sensor mounted higher than the primary bilge pump. When water reaches this level, it triggers an audible and/or visual alarm to alert the operator immediately.

Can a high-water alarm work if my boat is unattended?

Yes. When connected to the boat’s electrical system, the alarm can activate even when the boat is unattended. Optional upgrades include remote monitoring or integration with onboard alarm panels.

What is included in your high-water alarm installation service?

Our service includes proper sensor placement, wiring inspection, alarm installation, and full system testing. We ensure the alarm activates reliably and does not interfere with existing bilge pump systems.

Do you test the alarm after installation?

Yes, every installation includes functional testing. We simulate high-water conditions to confirm the alarm activates correctly and verify sound levels and indicator lights for clear alerts.

Is a high-water alarm required or recommended by insurance?

While not always required, many insurance providers strongly recommend high-water alarms. Having one installed can reduce risk, improve safety compliance, and may positively impact insurance evaluations.

Marine electrician crouching in a boat bilge, manually lifting the float switch of a newly installed high-water alarm system while checking a multimeter.

High-Water Alarm Safety Systems

SKU

2156

Rating:

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$150.00

Your bilge pumps work silently, but what happens if they fail or can't keep up? A high-water alarm is your last line of defense against sinking. We install loud audible and bright visual alarms that alert you before the water level becomes critical.

Details

Disaster Prevention

Sleep Soundly.
We Watch the Water.

Bilge pumps operate silently, but if they fail or are overwhelmed, you need to know *immediately*. We install independent High-Water Alarm systems that trigger a 100dB siren and visual strobes the moment water rises above safe levels.

100dB Audible Alert

You can't ignore it. We install piezo-electric sirens at the helm and in the cabin. If water breaches the safety threshold, the piercing 100-decibel alarm wakes you up instantly, giving you time to act.

Visual Strobe Light

Engine rooms are noisy. For center consoles or flybridge cruisers, we add a bright red visual strobe or LED indicator on the dashboard, alerting you to bilge issues even when the engine is roaring.

Redundant Circuit

The alarm must work when everything else fails. We wire the system on a completely independent circuit from your main bilge pump, ensuring that a blown pump fuse doesn't kill your warning system.

Installation Protocol.

Strategic placement.

Height Calibration

We mount the alarm float switch 2 inches *higher* than your primary bilge pump switch. It only triggers if the main pump has failed or cannot keep up with the leak.

Helm Integration

We run marine-grade tinned copper wire from the bilge to the dashboard, cutting a precise flush-mount hole for the indicator light and siren rocker switch.

Testing

We don't guess. We manually flood the bilge or lift the float switch to verify the alarm screams and the light flashes. We verify the "Test" button functionality.

Smart Options

(Optional) We can integrate the alarm with "Smart Boat" systems (Siren Marine/Nautic Alert) to send a text message to your phone if the alarm trips while you are away.

System Components.

Premium safety hardware.

Rule / Ultra Safety Systems Float

Waterproof 100dB Siren

Dashboard LED Strobe

Alarm Specs.

Loud and clear.

Volume 100+ Decibels

Voltage 12V / 24V DC

Draw Zero (Until Active)

Common Questions

Will it drain my battery?

No. The system draws zero power in standby mode. It only consumes electricity when the float switch is lifted and the alarm is actively sounding.

Where is the siren mounted?

We typically mount one at the helm (driver's station) and one in the main cabin/sleeping quarters to ensure you hear it regardless of where you are on the boat.