Fire Hydrant Inspection Precautions:

Because of the dynamics of water, there are a number of things that must be taken into consideration when testing out a fire hydrant.
Water Hammer
Water hammer is caused by an abrupt stop of fast moving water. It usually occurs if a valve is shut down too quickly. The effect of fast moving water slamming into a valve is the same as the effect of a fast moving car slamming against a brick wall.
Since water is in compressible, it does not absorb any of the energy from a high velocity impact – instead, it transfers it to the system, pipes, hydrants and ground, which can lead to cracking and all out destruction of the fire hydrant. At National Fire Protection, we take care to keep your fire hydrants safe from water damage during inspection.
Brown Water
Brown water is caused by a sudden change in the amount of water in a water main, such as the increased water flow from opening a fire hydrant. When water starts flowing faster, it kicks up sediment that usually stays on the bottom of the pipes and moves it with the water. There is nothing harmful about the sediment in water pipes, and at National Fire Protection, we work hard to keep the brown water out of your faucets during our fire hydrant inspections.
Is your Hawaiian building's fire hydrant ready for inspection? Call National Fire Protection today to make sure your hydrant is up to code and able to protect you in the event of a fire.

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