What is the hydrostatic test interval for stored pressure water and water mist extinguishers?

The hydrostatic test interval for stored pressure water and water mist extinguishers is every 5 years. This test is crucial as it ensures that the extinguisher can withstand pressure without leaking or failing. During this test, the extinguisher is filled with water and pressurized to a level above its operational pressure, helping to verify the integrity of the cylinder, valve, and other critical components.

Regular hydrostatic testing is a key component of maintenance for these types of extinguishers, as it identifies potential safety issues that could compromise their performance during an emergency. Adhering to this 5-year interval helps ensure that the extinguishers remain reliable and functional when they are needed most.