What is hydrostatic testing, and how often am I required to have it done?
Hydrostatic testing is when the shell, or body of the extinguisher is pressure tested to ensure there are no cracks, holes, or weakening of the cylinder. Normally your average dry chemical extinguisher is tested every 12 years from the manufactures date, or last time tested, unless it is mounted on a vehicle, then the test interval is every 5 years.
