Johnson Pump Bilge Alert 12V High Water Bilge Alarm, Part 72303

The Johnson Pump Bilge Alert (part 72303) is a 12V DC high water detection alarm built to warn boat owners the moment water starts accumulating in the bilge. Instead of relying on moving parts or a float switch, it uses field effect sensor technology to detect the presence of liquid directly, which keeps the design simple and reduces the chance of mechanical failure over time. Once the sensor is exposed to water for 8 seconds, the alarm activates a loud 100 db alert so it can be heard over engine noise, wind, and other onboard activity.

The alarm runs on a 12V DC power supply with a voltage rating of 10.5 to 14.4 V DC, matching standard marine electrical systems, and includes a switch panel with an integrated beeper so the audible warning is paired with a visible alert at the helm or panel location. The housing is made of black plastic for corrosion resistance in the marine environment typical of bilge installations. Because it has no moving parts, the Bilge Alert is a straightforward, low-maintenance way to add an extra layer of protection against unnoticed water intrusion, helping prevent bilge pump failures or slow leaks from going undetected until they become a serious problem.

Specifications

• Brand: Johnson Pump
• Manufacturer Part Number: 72303
• Product Type: Bilge Water Alarm
• Power Voltage: 12V DC
• Voltage Rating: 10.5-14.4 V DC
• Alarm Output: 100 db audible alarm
• Activation Time: 8 seconds of water exposure
• Sensing Technology: Field effect technology, no moving parts
• Included Components: Switch panel with beeper and sensor
• Color: Black
• Material: Plastic
• Product Dimensions: 3.86 inches L x 3.9 inches W x 7.64 inches H
• Weight: 0.4 pounds
• UPC: 729321723039

Frequently Asked Questions

What does the Johnson Pump Bilge Alert do? The Johnson Pump Bilge Alert (part 72303) is a 12V DC high water detection alarm that senses liquid in the bilge and sounds a 100 db alarm to warn the boat owner of rising water.

How long does it take for the alarm to activate once water is detected? Part 72303 activates its 100 db alarm after the sensor has been exposed to water for 8 seconds.

How does the sensor detect water? It uses field effect technology to detect the presence of liquid, so the Bilge Alert has no moving parts to wear out or stick.

What voltage does the Bilge Alert run on? The 72303 Bilge Alert operates on 12V DC power with a voltage rating of 10.5 to 14.4 V DC.

How loud is the alarm? The alarm produces a 100 db audible warning once triggered, loud enough to be noticed over typical engine and onboard noise.

What is included with the Johnson Pump Bilge Alert? Part 72303 includes a switch panel with an integrated beeper and the water-detecting sensor.

What material is the Bilge Alert housing made of? The housing is made of black plastic, chosen for corrosion resistance in a marine bilge environment.

What are the dimensions of the Bilge Alert? The Johnson Pump Bilge Alert measures 3.86 inches long by 3.9 inches wide by 7.64 inches high.

How much does the Bilge Alert weigh? Part 72303 weighs 0.4 pounds.

Does the Bilge Alert have any moving parts that could fail? No, the 72303 uses field effect sensing technology with no moving parts, which reduces the chance of mechanical failure compared to float-switch style detectors.

Where would the Johnson Pump Bilge Alert typically be installed? It is designed as a bilge water alarm, with the sensor placed in the bilge area and the switch panel with beeper mounted where it can be seen and heard, such as near the helm.

Is the Johnson Pump Bilge Alert genuine Johnson Pump equipment? Yes, part 72303 is manufactured by Johnson Pump and carries the Johnson Pump brand.