What are pinhole leaks and what causes them in fire sprinkler systems?
Pinhole leaks are the result of when pit corrosion breaks through the external piping wall of a fire sprinkler system from the internal piping wall. Pinhole leaks are caused by a local corrosion process where corrosion is concentrated into one specific area of the fire sprinkler system. They may be caused by microbial activity or oxygen cell corrosion.
