The AGF Model 7550 SMARTGauge is a 4" pressure gauge with a drag needle designed to record system pressure spikes caused by municipal water supplies or pumps that are not operating correctly. The Model 7550 can be installed temporarily or permanently to record wet system pressure spikes so Pressure Relief Valves can be sized correctly. On dry systems the Model 7550 can be used to confirm municipal water supply pressures so dry valves will not be overpowered by system wide pressure increases during periods of low demand. The Model 7550 is also a valuable addition to hydrostatic test assemblies because of its ability to record the highest pressure during system testing. The AGF Model 7550 SMARTGauge is available by itself or can be ordered with a heavy duty polyethylene storage case with a custom cut foam insert designed to offer the highest level of protection. SMARTGauge is made in the USA.