How should breakaway flanges be measured for fire hydrants?

Breakaway flanges for fire hydrants are measured 2 to 6 inches above grade to ensure proper function and maintenance accessibility. This measurement range strikes a balance between providing enough clearance above the ground—allowing for effective operation, maintenance, and visibility—while also minimizing the risk of obstruction or damage from ice, snow, or debris.

By setting the breakaway flange in this specific range, it ensures that if the hydrant is struck by a vehicle or another object, the flange will break away without causing significant damage to the hydrant, thus promoting public safety. Additionally, this height allows for easier installation and makes it more manageable for maintenance personnel to address any issues with the hydrant while keeping the hydrant accessible but still functional.

The other height options do not align with industry standards, as they either place the flange too low, risking damage or obstructive buildup, or too high, potentially complicating maintenance and operation.