What type of pressure was observed when the hydrant was open

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Question: You are dispatched to a building fire, and your assignment is to establish a water supply. The water supply for the building's sprinkler systems is fed from 4-inch fire service lines that are controlled by a post indicator valve. The first arriving units report that the sprinkler system has activated but there does not appear to be a strong water discharge from the heads. Upon arrival, you connect to a hydrant; once the hydrant is opened, you find the volume is lower than normal and there is a considerable pressure drop. According to the water system maps, there is a 24-inch main in the street, so there should be adequate volume. However, you are aware that there was a recent water line break on the street, and you can see a fresh asphalt patch in the road where the water line was repaired. What type of pressure was observed when the hydrant was opened, and water flowed from the hydrant?

Reference no: EM133670158

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