
Completely reliable and accurate
Economical unit installs with special tool into the vent pipe
Allows you to add a whistle into an existing tank
Stops costly spills and prevents ruptured tanks
Improves delivery efficiency
An audible alarm installed in the vent of the tank to notify the fuel delivery operator to stop filling as the tank to avoid a spill
Calibrated whistle stems allow for product expansion
Whistle stem may be cut for flat-style tanks
Patented screen keeps whistle chamber free from pipe scale and bugs