Quick Answer
Ice buildup around a frost-free hydrant can be caused by a combination of factors including poor drainage, inadequate heat transfer, and high water pressure.
Inspecting the Hydrant and Surrounding Area
Inspect the hydrant and surrounding area to identify potential causes of ice buildup. Check for proper drainage around the hydrant, ensuring that water is not accumulating and freezing. If the hydrant is not properly installed, consider re-grading the surrounding area to improve drainage. A minimum 6-inch radius of clearance around the hydrant is recommended.
Evaluating Hydrant Performance
Evaluate the hydrant’s performance by checking the flow rate and pressure at different temperatures. A frost-free hydrant is designed to maintain a minimum flow rate of 10 gallons per minute at 32°F (0°C). If the hydrant is not meeting this standard, consider having it inspected and repaired or replaced. Check the hydrant’s temperature output, which should be at least 40°F (4°C) above freezing.
Maintaining the Hydrant
To prevent ice buildup, maintain the hydrant by regularly inspecting and cleaning the valves, drain assembly, and surrounding area. Consider installing a frost-proof drain assembly, which can help to improve drainage and reduce the risk of ice buildup. Additionally, ensure that the hydrant is properly sized for the facility’s water demands and that the water supply is not over-pressurized, as this can cause ice buildup and damage to the hydrant.
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