How frequently does a dry system need a full-flow trip test?

A full-flow trip test is an essential procedure for ensuring the reliability and effectiveness of a dry sprinkler system. It verifies that the system will operate as intended in the event of a fire. When considering the frequency of these tests, it is important to understand that code recommendations and industry standards dictate how regularly these safety checks should occur.

Dry systems, which operate differently than wet systems, may become susceptible to freezing or other issues that can affect their functionality. The recommended interval for conducting a full-flow trip test on a dry system is typically every three years. This interval strikes a balance between ensuring that the system is regularly tested without being excessively burdensome on resources. Testing at this frequency allows for any issues to be identified and addressed while maintaining an operationally safe system.

By performing a full-flow trip test every three years, sprinkler fitters ensure that the system's components function correctly and that the system maintains its integrity to provide the needed coverage in a fire event.