Dry Pipe Valve Trip Testing Frequencies, Water Delivery Recording, and Internal Inspections

If you dump hundreds of gallons of city water into an unheated parking ramp dry system in the middle of a Minnesota January during a routine annual inspection, you aren't just an idiot—you're going to burst system branch lines and freeze out the jobsite. Yet, half the apprentices taking the journeyman exam lose points because they think a dry valve has to be tripped full-flow every single year. Today we’re breaking down NFPA 25 Section 13.4.4.2 so you know the exact line between the annual partial-flow test and the 3-year full-flow test when the state examiner puts the pressure on.