UView Engine Combustion Leak Tester Kit (Gas Natural Gas Diesel Detector) 560000 18 AWG The HydroFix™ Hydrostatic Release Unit Road Safety The HydroFix™ Hydrostatic Release Unit (HRU) is a patented rod system that allows a beacon to be quickly and reliably released from a Category I bracket when submerged in water between 4 Square Jack with Footplate Drop Leg Sidewind 28 11 16" Lift 5 Economical and Accurate method to test for combustion gas leaks Tests for: > Head gasket leaks > Cylinder head leaks > Engine block leaks Dual chamber design for higher accuracy to eliminate false readings: The tester features a dual chamber design for higher accuracy to eliminate false readings The first chamber will filter out any alkaline particles that could result in a false indication of a combustion leak