Right now manufacturers have recalls on hundreds of thousands of L/P regulators and other L/P recalls! Revolutionize your shops with this tool and it will take the average measurement process time for the timed pressure drop test and regulator adjustment from roughly 30 mins down to 7 mins saving you precious time while improving the safety of the RV propane system by not compromising opening the LP system. Simply use the units gas bbq port and complete all your tests without breaking open the L/P system fittings! Patent Pending.