4" Haynes st loading dock: Perform a full flood trip test on the dry system. The purpose of completing a trip test for a dry pipe valve, be it a partial test or a full test, is to ensure that the system will operate. A dry pipe system's full trip test allows for a comparative assessment of the water delivery time that can reveal significant delays in the system operation. #5 Dry itv at loading dock: Perform a full flood trip test on the dry system at the Lakeside building. The purpose of completing a trip test for a dry pipe valve, be it a partial test or a full test, is to ensure that the system will operate. A dry pipe system's full trip test allows for a comparative assessment of the water delivery time that can reveal significant delays in the system operation.