WHISALERT is installed onto your boat's fuel vent system, between the tank and the hull vent. WHISALERT makes a clearly audible whistling sound as the air in the tank is displaced by the fueling during filling. The whistling sound begins to stop as the tank is approaching full and stops when the tank is completely full. This alerts the person filling the tank that it is full, thus helping to prevent fuel spills. Loud enough to be heard from anywhere on the boat, this simple and inexpensive device is guaranteed to help prevent fuel spills, therefore saving you the clean up and helping to preserve our marine environments.

WHISALERT should always be installed in an upright position and can be installed anywhere on the vent hose. The farther away from the tank it is placed, the more lead time the filler will have to stop filling before a spill occurs.

The person filling the tank should be aware of how much fuel they expect the tank will hold and if possible, should slow down the flow of fuel while the last few gallons are pumping. Slower pump speeds will also create less foaming in the tank, which will improve the effectiveness of the WHISALERT and help prevent spills.



The Federal Pollution Control Act prohibits the discharge of oil or oily waste into or upon navigatable waters of the United States.

Whistle Works, Inc., the makers of WHISALERT, are proud to offer a 1 Year Limited Warranty on every WHISALERT sold. This limited warranty covers any malfunction of WHISALERT caused by product defects directly resulting from imperfections in manufacturing. If you have any questions about this warranty, please e-mail us at customerservice@whisalert.com.
Help prevent a spill ...
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WHIS
ALERT does not prevent spills and is only effective with the interaction of the person fueling.

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