What is a 5 Year Obstruction Test? | Fire Sprinkler System


A 5 Year Obstruction test is performed on an automatic fire sprinkler system every 5 years to assure that the fire sprinkler system is in good working order.
According to NFPA 25, An assessment of the internal condition of piping shall be conducted at a minimum of every 5 years or in accordance with for the purpose of inspecting for the presence of foreign organic and inorganic material.”  
During the inspection/test, a trained professional will open different parts of the fire sprinkler pipe to check for obstructions and or corrosion that could compromise the system. Corrosion including Microbiologically Influenced Corrosion (MIC), rust, or slime can cause obstructions in the pipe over time. When oxygen is introduced to water and metal, corrosion occurs.
5 Year Obstruction Test
Microbiologically Influenced Corrosion or MIC are microorganisms that cause metal to breakdown. If MIC is present in fire sprinkler pipes, it is imperative to identify what bacteria is present, so it can be treated. If the bacteria is not treated properly, the piping will corrode and can eventually cause a leak or break in the sprinkler pipe.
Below is what to expect during a Fire Sprinkler Obstruction Investigation:
To learn why a 5 Year Obstruction test is important, please click here.
To learn how to decrease corrosion in a fire sprinkler system, please click here.
If you have any questions about the above topic please call 973-560-1600.