This is a yard hydrant which had not been flushed for many years. This hydrant has been flowing for 3 to 4 minutes when this picture was taken, and the water is still brown. Yard hydrants should be operated and flushed on an annual basis. Each hydrant in your fire system should be opened fully and flowed until all foreign material has cleared, but for not less than one minute. A good flushing to remove silt and particulate matter should be performed annually to clear the underground pipes of debris.
Hydrant flushing should be performed annuallyApril 13, 2011
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Posted by Walt Beattie