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A clapper valve has been opened As their name suggests, the inside pipe of the hydrant down to its valve five feet underground at the water main is empty and dry until the valve is opened The temperature outside is above freezing
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The stem nut is operated to open the control valve Dry barrel hydrants do not have water in them all the way to the top A water main has broken
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Learn about the differences between wet barrel and dry barrel hydrants Understand which type suits your climate and maintenance needs Contact irwin's safety for expert advice. The hydrant is dry because it does not have water in it all the time, which prevents the water from freezing inside the hydrant and causing damage.
Dry barrel hydrants get their name from the fact that water is drained or pumped from the barrel when the hydrant is not in use Dry barrel hydrants are pressurized and drained through the workings of a main valve located in the base of the hydrant. Reduced water volume or pressure from hydrants can result from Greater demand than the system can provide
